Yes, the Classic Accessories RV Cover part # CA80104 has adjustments built into it so that the extra material could be cinched down and the fit would be tight. view full answer...
Fifth wheel rail kits like the Reese kit part # RP50054-58 do not fit with B&W Turnoverball gooseneck hitches installed at the same time. They would interfere with each other. Your best option would be to use the B and W Companion Slider hitch # BWRVK3400 which is a slider hitch that fits directly to the Turnoverball gooseneck hitch you have without needing any type of rail.
If you already have a slider hitch though and do need a set of rails like what the Reese kit offers you could instead... view full answer...