Seasonal Camping roof protection

thanks for the advice all. This is a provincial park, so the regulations on what one can string up are pretty liberal. Having said that, the last thing I want to do is put up a 20 foot rain catcher. I think the way I'm leaning is to buy a roll of fairly heavy poly and cut to the size of my roof (making allowances for the stack and a/c) then weighing that down with a few 2x4's. same with the awning, but I'll use clips to affix the cover.

ends will likely be going up every time, at least until we are going down every weekend.