I suppose the grandfather of our "trucks with campers" would be John Steinbecks' Rocinante - his '60 GMC with a special camper he custom ordered. He used the trip and observations fort his books "Travels with Charly" It was the first book I read of his and to this day my favorite.
His truck and camper were restored and put in the museum. If you have not read the book, do so as it is very good.
http://www.pauahtun.org/Misc/Rocinante.html