Between Dutchman, Lizzie and Bomb, you have a real good starting point. As you owned a truck camper, you are not new to Rving but, I'm guessing it wasn't a real big TC as mine had most of what our current little Cl.A has.
If DW thinks a back up cam in nice, get one. It can save it's cost with the first thing you don't hit.
Bedding is real important, because if you don't get a good sleep, the fun never starts.
Other than that, take it out for the first night in the driveway and see what it is missing (new things always are). Then, start enjoying it. It is a big level of convenience about a TC(truck camper).
Matt