i leave it on there. at the dump site, i dont have a container to put them in, so i just pull the tarp out and dump it on the ground beside the trailer. i try my best not to dump a lot right behind the truck, but sometimes i mess up and do, but its not a big deal because i just run over the pile with the trailer.
and to keep the leaves from blowing out while im on my way to the dump site, i use two ratchet straps. i pull both sides of the tarp over the leaves, and strap it cross ways across the top of the tarp. this trick i learned from a guy on this site.
My set up:
-2007 Chevy 2500hd 8.1l 4x4
-7x18 enclosed trailer
-Grasshopper front mount 61", gravely 52"
-36" Gravely Walkbehind, 21" exmark push mower