Because I spend a lot of time on the road & not unhooking the trailer unless I'm staying more than a night or two, I'd have a problem with slides, drawers, etc. I have a rigid tri fold cover & a extremely useful 6' aluminum pole with a 6" long piece of flat 90° to the end. Like this
, but mine is not adjustable.
I store everything in either bags or plastic storage boxes, any use the "hook" to dig things out. Not as organized as the previous solutions, but very flexible & it works for me.