We just bought a 2020 170SS. Getting ready to use it a couple of times before it gets to cold. We bought alot of little things and sort of like setting up a new house. Ours came with starter kit with hoses, leveling blocks, electrical adapters, etc.
One thing I did already was install a lift shock on the overhead cabinet above the bed. It keeps the door open by itself.
I would like to also see what others have done to their forest rivers.