Definitely, making a bike camper into pusher a good idea. At least make it haul most of it's weight, if riding a pusher sounds awkward. Have it push enough to feel like it's barely there. Regen braking on it worth it's weight in lithium too I bet.
Now that I think about it, it would be possible to make that trike camper a sleeper. At first glance I thought how? Too narrow, and the bottom part too short. But still possible, as you open the door, you'd see a bed lengthwise right in your face, and perhaps as small as 16" wide you can actually stand up in. Under the bed, stove, sink, etc. Now I see how it could be done.
Every time I think about it, making one home made, I come back to the same kind of idea. a low trailer with a bed in it, and a pop up section for the head area so you can at least sit up inside. The section that does not pop up has a sort of chuck wagon in it, above your feet as you lie in the trailer. open a hatch, there is a small cooler, and a stove. Very minimal, but no flapping tent. Perhaps no pop up needed, just make the thing about 3' tall. Change clothes lying down, as you do in small tents anyway.
I'm also eyeballing my Schwinn trike, Hmm, lengthen it to have a 6" long box on it. Trike with a coffin to sleep in? Hmmm. Two more support wheels that are giant casters? Hmmm.
Some places a tent is fine, but here out west in the spring winds, or summer during the thunderstorms, you'll regret a tent. Many of the western camp grounds are also heavily skunk and raccoon infested. Ever wake up with a skunk sitting on your chest staring you down? Real fun.