Looking for an RV parking pass for the Northwestern game. It is the day before my brother's 40th bday so his wife is planning a surprise get together at the game. I am borrowing my friend's RV as central base. I see there are different types of RV passes. Some that you can stay at for the weekend(ORV) and some that you can only arrive the day of the game. So I have a couple questions for anyone that might know. First, are the RV's in the ORV lots the only ones that are allowed to arrive Thursday or Friday before the game and stay until Sunday? Second, I see on the parking maps there are specific RV lots but yet I have a pass in lot 31 and there are also some RV's in that lot. Third, are the rules for arriving and leaving with an RV loose or are they strict? Finally, any recommendations on the best way to obtain a pass? Thanks in advance for any help.