Hi we had a good Easter too but didnt get away had hols couple weeks back to miss the crowds. I am guessing you mean from the zip on cover of a canvas camper. We havent done anything to stop ours but it does seem that the more we have packed under there and spread about evenly as possible and it seems to be less than when we first got it and there was nothing under there. We have our bedding and pillows if it is made up, 2 flat chairs, waffle mats that we put under tent floor our 2 side walls to the awning/annex, our storm cover. On top of the bed are drifta bed table and bed head. Sorry that is not much help but might depend how much is under it. Hope you solve the problem