We've had a '92 Caribou similar to Richandtd,s, except ours has a 2kw gen and crossways sleeping, since '93. During that time I've replaced the rubber roof with aluminum, rebuilt the back and front because of wood decay, as well as numerous other smaller items I don't remember as well. That being said, we have carried the camper over 200k miles with a '89 Dodge Cummins W250 standard cab all over the lower US and Alaska. The Dodge has had it's many problems over the years too, but overall they have been a great combination to travel long distance in as well as a lot of boondocking for fishing, hunting, and exploring. At 285k the Cummins has been bulletproof requiring nothing but routine maintenance, starter, and gen. I will say the camper begins to feel pretty small after a month or so. The last 10 or 15 years we have towed a Samurai and later a Tracker behind it. Before and during that time we also towed various other trailers, including once across the US towing a 24' 10' high enclosed car hauling trailer. That one was a bit much as we were in 4th gear almost as much as we were in 5th with a limit of about 60mph before "tail wagging" began.
Although our roof problem was much earlier and pretty extensive, it was only Fall of '14 that I had to address the rear after the bumper was about to fall off and the lower front in the Spring of '15, although I did do occasional inspections followed by sealing and other preventive measures.
Congratulations on your purchase. I hope you have at least as many wonderful experiences with it as we have had with ours.