I was looking to upgrade my Patrol to a newer version and get a camper trailer last year. The missus loves camping(woohoo) but doesn't like tents(double woohoo).
We had a few discussions about it over a couple of months and decided to keep the old Patrol and get a cheap camper trailer. The main reason was so we didn't have to borrow any money, therefore having the mortgage as our only debt.
We have since relocated interstate and bought a cheaper house in an average suburb for the same reason, to keep the mortgage down. We also now have an 8 month old girl who loves camping!
The missus is a nurse and has just gone back to work 1 shift each week. I am also like Darren, I did not want my missus to go back to work, but she loves it so we came to a compromise. I am an electrician on wages, definitely not making big dollars!
Moral of the story: We still have the old Patrol, towing our cheap camper trailer, living in an average house/suburb. Luxury sacrifices were made (the 51cm TV is the main TV, it is colour though
), BUT, the financial stress is not there and we get to go out camping regularly. I can take time off work and get to the good camping spots midweek when no one else is around and not worry if the bills will be paid. Seeing my daughters eyes light up when a kangaroo hops past the campsite or she touches a tree with rough bark beats the hell out of having a flash car/camper and a nice house in a fancy suburb!
If it comes to it, just sell it. Its only a camper trailer, and the stress relief and time spent with your wife and son will soon make you forget about the camper. As long as your missus likes tenting, do it!