Congrats!
We went to costco and bought a bunch of food for our rooms. Bagels, etc. No one really ate that stuff to be honest. Everyone liked the hotel food better We did OOT bags with tons of snacks from Costco.
If you're doing a 3-day trip like a lot of brides (and we did), I wouldn't worry that much about there only being one restaurant. The food at the Seven Seas is really great. I didn't get sick of it at all. Like Janet, I would also advise your guests to rent cars. There are a lot of great restaurants locally and they're probably going to want to get out. Zippers is pretty close and was good. But considering that people will prob arrive on Thurs, with some food & drink provided, and meals provided Friday and Saturday I would definitely not be that concerned about providing anything more.
We had 2 events in downtown, but did not worry about transportation for our guests. The hotel can arrange large van cabs. Most of our guests just jumped in those together. I don't think that it was more than $10 each to use these cabs and they fit about 10 people. Other people drove themselves.
hope that helps, and congrats