We went in 2021 & 2023.
We stayed at the Holiday Inn & Suites in Council Bluffs, Iowa (next to the casino) in 2021. Five-minute drive to the stadium.
We stayed at the DoubleTree by Hilton Omaha in 2023. A little further drive but no big deal.
Parking is easy. They have automated parking meters, with an app that shows where you parked. There are also lots all around for reasonable all-day parking.
There are several bars and restaurants around the stadium. We spent some time in a few during a rain delay before the Tennesse game.
For hats and t-shirts, the fan experience is the only place to get the official gear. Look at everything before you decide, unless you want multiples.
The Old Market is near the stadium (maybe not walking distance), but there are many really nice places to eat.
The Old Market in Omaha NE - Omaha's Arts & Entertainment District
Take sunscreen. The heat and sun can be brutal. You will get shade on the 1st base side later in day, but it gets hot.
There are really no bad seats in that place. We went in early and walked the entire stadium. It is really nice. They do an excellent job.
Enjoy it. It is a fantastic experience. Wish I could go this year.