30 years...looks like you are in for quite an "eye-opening" return.
There are plenty of good/great restaurants. The more obvious ones are Dreamland, Archibald's, Wayfarer for breakfast, Cypress Inn, Chuck's, and so on and so forth. I'm sure you will get plenty of suggestions.
Obviously the Bryant Museum is a must. I would really suggest you take the time to take a tour (walking or riding) of the campus. You will definitely be surprised to see how much it has changed.
IMO, the #1 thing you need to do is get up early on gameday and take in the new "Gameday" experience. Marching band entry into the stadium, "Walk of Champions", and tailgating on the quad. Tailgating on the quad has become an event in and of itself. If you do not have any plans yet or just want to visit, let me know & I will be more than happy to let you know where our tailgate is located on the quad. You are more than welcome.
Bottom line...things are going to be different than you remembered and hopefully ESPN Gameday will be there while we clinch the west again.