As I've tried to start on repairing the sideboards on my camper, I need to remove all the stuff that I have bought and have stored there on the bunkends. I've considered taking it to storage because I don't want to put it in the shed where everything will get dirty. But I got to thinking that I need a cover for my truck and was going to get one, but if I had it now I could take stuff from the camper and put it in the back of the truck. I know nothing of bed covers except I cannot do the snaps. I had initially thought about getting a tri-fold until I saw the soft roll ones without the bars where I can still have access to the back of my truck. I've found several on ebay, and I'm looking at the Soft Lock & Roll Tonneau Cover by PRIME CHOICE. https://www.ebay.com/itm/352286613209 It's cheap, which is good for me, and I can roll it up, but I don't know if it will keep the bed of my truck dry and also how does it lock? I have a very limited income and can't afford to buy the wrong thing.