Been there. We sat on the equipment and only camped 1-2x/year for quite a few years. Worth it for us as truck and trailer were paid for and old enough to not be worth much anyway.
We're pulling out of it all now, travel sports are pretty much over for us and only a few more years till both kids are off to college (or whatever is next).
We got back into RVing last year again and decided to sell the trailer (still kept the van though) and move to a motorhome. So one could certainly argue that the 5 or so years that the trailer sat in our yard getting used 1x/year was a waste of money, but to me it was worth it for those 1-2 trips with the family.
Even if it was only a few trips, both kids feel like they grew up camping.
Anyway, to the point, no I did not do what you are proposing. But when we did get back into RVing several years later, our needs had changed significantly and we're now in a motorhome instead of a truck/trailer. So one could certainly argue that the smart move would have been to sell everything way back then, and rent for the one trip/year. But hindsight and all that, it's hard to predict. I always went into each year thinking, 'this is the year we get out camping again!' only to end up at softball fields every weekend lol.