Traffic will be bumper to bumper but thats just par for the course here in the summer. To drive a mile might take 45mins to an hour. The rod run is in April and September so you will miss that traffic. But during the Summer the city tries to have something every weekend. Check that here.
https://www.pigeonforgetnguide.com/events/
Where to stay...
Wilderness of the smokies is a resort with its own indoor/outdoor waterpark. It's on the outside of all the humble and bumble as you come in. I've heard good reviews and bad reviews. Never stayed there.
Wilderness at the Smokies - Tennessee's Largest Waterpark Resort
When I stay in a cabin for a weekend getaway I usually use VRBO. I like that all my transaction is paid online (dont have to go to the cabin rental office) and I can go straight to the cabin with a code for the door lock. Either way, you can find what you want whether using it or a cabin rental company as for what you want like game room, pet friendly, spectacular views, or indoor private pool in the cabin itself. Just depends on budget. Most of the cabins are in resort properties and also allow you to use the community pool for that cabin resort also.
Check out this VRBO rental:
https://t.vrbo.io/7BsfuX5cuT
I stayed in that cabin in the link last April. The lady I'm dating had a daughter having a birthday that wanted 4 friends over. They had a blast. Very nice Cabin. Not sure you need two bedrooms but thought I'd throw that one out there since I've stayed in it.
Gatlinburg Cabins | Pigeon Forge Cabins - Rentals in TN
Have used this company before without a problem. They have rentals in Pigeon Forge and Gatlinburg. I can't link the cabin I stayed at because it burned down in the wildfires a few years back.
Dollywood's Smoky Mountain Cabins | Pigeon Forge Cabins
If your wanting something close to Dollywood and Dollywood Splash Country they have their own cabins. You can also find cabins close to Dollywood in the others I have mentioned. Don't know of anyone that has used these, probably a little higher with the name attached but not sure.
Things to do... Pigeon Forge
Dollywood and Dollywood's Splash Country | Dolly Parton's Smoky Mountain Vacation Destination
Dollywood's Splash Country Water Adventure Park | Smoky Mountains
This just opened last fall and seems to be a big hit.
It's always 60 to 70 degrees inside but with snow tubing.
Pigeon Forge Snow | Indoor Snow Tubing All Year Long
Flyaway Indoor Skydiving | Indoor Skydiving - Pigeon Forge, TN
Heard nothing but good stuff about the indoor skydiving. Never tried it but plan on it.
If you all want to do a little shopping while here there's Tanger outlet. It has any and every outlet store you could think of. Just get there first thing in the morning when they open. Gets very busy through the day.
Tanger Outlets | Sevierville, TN | Stores
There's a plethora of go cart tracks, arcades, and putt putt. To many to list. There's way more but If you see something your interested in that I haven't listed just ask.
Things to do......Gatlinburg
Ripley's Aquarium of the Smokies | Gatlinburg, TN
Been through this and it's very nice and something to see.
Ober Gatlinburg has indoor Ice skating year round with a restaurant and candy shops. If it was winter when you come there would be more activities like skiing, snow boarding, and tubing but they do have a pretty good size water slide at the top the run in summer. You can drive up and park which costs $5 now. But I would suggest riding the Tram up to it if you decided to go.
https://obergatlinburg.com
https://obergatlinburg.com/aerial-tramway/
The space needle in Gatlinburg is nice to go up for some pictures and great views. Over 400' in the air.
https://www.gatlinburgspaceneedle.com
The Gatlinburg Sky lift also has spectacular views. It is completely brand new since the wildfires. I haven't rode it since it was rebuilt. But the views should be the same as I remember from before and beautiful.
Gatlinburg Sky Lift
There's other stuff like Ripley's believe it or not museum and things like that. Again you see something you want to know something about ask away.
If you're going to have maybe the grandparents with you to allow you to get out there's all kinds of moonshine, microbreweries, and wine tasting whether in Pigeon Forge or Gatlinburg.
Food...
https://www.alamosteakhouse.com
One in Pigeon Forge and one in Gatlinburg. The Gatlinburg one was just rebuilt after the wildfires. Delicious steaks. A little pricey but very good.
My favorite place to go or eat in PF is Bluffs. It has a tiny sign. Not alot of tourists even know it's there. Food is delicious and they have over 31 beers on draft. Pool tables, darts, cornhole, and ping pong all inside.
http://www.bluffsgrillandtap.com
The old mill in PF doesn't play around when it comes to food and portions. One of my favorite places for breakfast.
http://old-mill.com/page/omr-breakfast
http://old-mill.com/page/omr-lunch
http://old-mill.com/page/omr-dinner
And you have Olive Garden, TGIF, longhorn, Outback etc. of all the chain eateries also.
Questions? Lol. There's alot I'm missing even though I live here. Maybe others can suggest things I have forgotten.