I've had a cover for 5 years. I started to question the benefit of the cover and didn't use if for a couple of years. I'm back to using it now since my neighbors pine tree creates such a shower of needles.
I read a suggestion on this forum a few years ago that has worked great. Buy a large wheeled trashcan with a tight fitting lid. When it's time to remove the cover undo all the straps and cinch cords. From the roof of the trailer pull this sides of the cover onto the roof and begin folding the cover lengthwise into the center of the roof. You will end up with a folded cover about 3 foot wide running the length of the trailer. Now move the to ground and position the trashcan at the front of the trailer. Pull the cover off and stuff it into the trashcan as you do so. Reinstalling is just the reverse. Place the cinch cord that is attached to the back end of the cover (it should be at the top portion of your trashcan) so that you can reach it from the roof of the trailer. From the roof, begin pulling on the cord and the cover pays out from the trashcan as you pull it down the length of the roof from front to back.