Don't know what the torque rating is on the bed .. sorry.
As for disassembly, it's somthing you could probably do fairly quickly. Disassemble/remove electrical, then the tailgate. unbolt floor from frame, and have a few buddies help you lift it up and off. then just start undoing all the bolts. youll have the forward bolts up front. then the wheel wells and side panels unbolt as well..
i'm willing to bet this could all be done in under an hour..