Are "all-bed" campers length safe? Most compatible all bed?

Thanks @KD4uPL for the general trends. That is very useful. For max compatibility, do you think narrow campers are worse off than wider campers because of the dually? Big wheel wells give the advantage to narrow campers right? So I guess what is more common in the pickup truck field: large wheel wells or duallys?

So @azdryheat, yeah you need a 1 ton truck for sure. And ya those are my concerns too.