It's not often, but we have loaded up our truck bed (everything was secured with bungees and straps):
I often have firewood, my campground grill top (
The Awesome Grill) and a couple of little things in front of the hitch. Sop far, my sewer boxes ride in the truck bed on either side of the hitch.
Our bikes go inside on the dinette table. I wheel them up on their backwheel through the camper and then use waterproof blankets (aka Neat Sheets) to protect the table and bikes from each other. I'm debating either a pin box mount or on top of the truck (1 kids bike, my bike is pretty light, but my wife's is pretty heavy).