Additional suggestions for UC Davis.
If they still offer an info session before the tour, make sure you attend both. The tours leave from the Welcome Center which is a short walk from Hyatt Place. Warning, Hyatt Place sells out quickly if there are events on campus. I’ve stayed at the Aggie Inn and Hyatt House as well. Hyatt House just opened in 2022. It is a little farther from downtown but is a newer hotel. The Hilton Garden Inn is close to the train tracks so some people complain about noise from the trains.
Things to see: Visit the Memorial Union which houses the bookstore and Coho (Coffee House and food court). There is both indoor and outdoor, dining. Check out the arboretum, the Tercero cows, Davis Farmers Market, Shrem museum. I think the coffee center is open for visitors now as well.
Places to eat: Burgers & Brew, Davis Creamery, Ali Baba (breakfast burritos)