How hard is it to leave on Sunday?

My girlfriend and I are thinking of trying to leave roo Sunday night and getting a good nights rest and shower at a hotel somewhere in the area before the trip home on Monday morning. Staying Sunday night on the farm and leaving Monday morning doesn't really bother me but she would like to be able to get a respectable shower and decent rest before the long ride home and I can respect that. So assuming that is our only option, how hard is it to try to leave the farm Sunday night? We will most likely leave sometime during the Dead set and will both be completely sober at the time. I've never been to roo before and need to know how this would play out.. Thanks in advance!