What woodbutcher said.
They are going to great lengths to prep the track and infrastructure for F1 race type traffic, MotoGP shouldn't be a problem at all. I'd get a hotel closer to town.. you can find weekend rooms just off 6th street for $120 without too much trouble. And most of the hotels down there will have parking garages, though you will have to pay an additional fee.
I actually got a Friday night room at the Hilton for less than $150 in August.. and it was right in the middle of all the action down town.