Chesterfield's is good, but I'd really recommend Purple Parrot/Crescent City Grill over them. The last few times I've been to CF's (and on a students budget, its not often ha), my steaks have been severely undercooked.
As far as RV tailgating near the stadium, GOOD LUCK! That's the best I can offer.
The only place near the stadium to park an RV would be on Loyalty Field, and the pass for the area is only gained by paying into the $2,500 or $1,500 Eagle Club levels I believe. The Eagle Club handles all Game-Day parking and tailgating locations on campus and near the stadium though, so you might want to give them a ring tomorrow and talk to them about something for visiting fans.
(601)266-5299 will put you to their front desk.
Hope that helps.