Planning a vacation in your RV requires some research ahead of time so you can find the perfect campsite for your adventure. 1. Site Restrictions Every campsite has site restrictions in place. The most common type of restriction is the length of the RV, which is typically non-negotiable. Your RV can be shorter than the prescribed length, but it cannot be longer. There may also be width restrictions, which means there isn't enough room to deploy slide outs or awnings.