For what you do, are you sure a truck camper is the best bet? Might you not be better off carrying the bike in the bed of the truck, and pulling a small trailer?
I’m not sure how much you wanted to spend on a truck camper. You could get a used Casita trailer for $10 to $12 K. Or you could pick up a small cargo trailer and convert it. There is a VERY active sub-group for that over on the Teardrops and Tiny Travel Trailers site.
Another possibility is a Jumping Jack Trailer.
Some resources to look at:
I don't like to make plans. They cause the word "PREMEDITATED" to get used in court!
DON'T FEED THE VULTURES!
My Body is a Temple! Ancient, Crumbling, Probably Cursed . . .