Camp, Forrest, Camp!, my story is similar to yours!
I used to go boat racing (limited hydros and flat bottoms) and the races involved going to some lake for the weekend. My buddy and I always just slept in the back of his pickup with a canopy on it.
Everyone else had a truck camper on their boat-towing truck. All day long it was boat racing and being on the lake, but late in the evening, it started to suck that I had nowhere to go. I went inside a few other guy's campers and couldn't believe all that was on the back of their pickup… and when I could hear them taking showers in the morning, well that was it, I wanted a little house on the back of my truck too.
I eventually got out of the boat racing thing (evidenced by the fact that I'm still alive!) and at least five years passed with the camper just sitting in the yard. I even upgraded to a bigger one… I had no use for it but I just knew I had to have one.
I started going to the Burning Man festival in 2000, and all my old boat racing gear went back into service providing me life-support in the Nevada desert.