There are no gates when you exit the highway and head down to the toll booths at HSB, so unless they setup temporary barriers over night, which I do not know, I don't see why not.....however, it is a steep hill down to the toll booths, and only flattens out right as you enter the booth. Not an overnight sleeping friendly spot at all. Too steep. RV toll booth is the left lane as you come down the hill. Be careful not to mistakenly take the left lane Horseshoe Bay downtown exit near the top of the hill. Once you pass the downtown HSB exit, there is no way out if you change your mind.