Congratulations!!! Everyone needs to make the trip to Mecca at least once in their life.
I usually eat before I go inside because, like most of the other major sport franchises, you pay extra inside. A brat and a drink just to say you did it won't break you but you wouldn't want to get 3 or 4 beers.
Things to do- The HoF and Tour are great. They have a huge gift shop. Naturally it's bit pricey too. There is another clothing store The Jersey Store a few blocks from the stadium. 1931 Holmgren Way, Green Bay, WI 54304
There will be all kinds of vendor booths as you walk up Armed Forces Dr. Be sure to get a few beads. They are about a $1 each. My secretary has a couple of girls and I stop to get them some stuff for Christmas every year.
Their new Titletown park should be well underway. I don't know much about it but it's across the street from the stadium.
Restaurants- There is all the typical franchise joints around. Many of them between the stadium and the expressway. Zero likes Krolls for a burger I have been to the HuHot a few times.
Bars- Stadium View and Anduzzi's a re a couple of the bigger bars near the stadium. The Bar is a 3rd option. Green Bay Distillery use to be a curling club as I walk back to my car they always look crowded.
Eagles fans are some of the most self righteous, obnoxious fans I have ever seen. They travel well. If the Eagles are doing well you will hear the "Fly Eagles Fly" chant until you are ready to puke. A coupe of years ago my sister in law live streamed in Chicago at the Bears - Eagles game. the fans were just as annoying.
Have a good time and bring home the win.