That was one of my first projects after finding bits and pieces in the compartment for the winterizing/drain valves. I opened everything I could & removed larger bits, then vacuumed the remainder. I think the Sunseeker lost 20 lbs!
I've saved all the wandering hardware - there sure were a lot of extra (ahem, paid for) screws of various lengths & types.
I used to work at Terry Trailers in La Grande Oregon in the mid-70s. We left none of that stuff anywhere, and final inspection checked everything. It was demeaning to have to go to the end of the line & fix something that should have been right or clean to begin with. Plus, that took time away from your normal job.
Forest River should be doing a better job than that.
I found the slide controller down next to the pump as well - I couldn't get to it, so I rearranged the wiring and moved it to the wall above the water heater.
BTW, to winterize the water heater on a 2250/2251, all you need to do is open the bottom drawer all the way:
Access is easy... I took this pic through the gap:
So much fun!