Information about pre festival activities TBF

Sorry newbie to TBF. We would like to attend pre festival activities but we are camping at Mary E. We thought we would ride our bikes on trail but are thinking that may not be legal as they are class 2. The first part of the trail out of Mary E sounds like it is the problem. Parking sounds like it is hard if you drive. We have not been able to find info on a shuttle for the pre festival days info. Does anyone have experiences or info to share?

What is class 2? We rode from Mary to town on chromoly mtn bikes.