At Whitewater State Park (Indiana) this week end, a fellow pulled in to fill his water, which was right at the edge of our campsite. He had a 2004 Dutchmen Sport Lite LE, that was almost identical to our first travel trailer. Apart from being just dirty and a bit green with moss (quite obvious from sitting), it was in good shape. He just bought it from a friend and this was his first outing with it.
2004 doesn't seem to be "that old" to me, but that was 14 years ago. Wow ... have I aged that much!
Anyway, in 1971 I was in the 10th grade in High School. Now... THAT was a long time ago! It's great to know, that if taken care of with a little love and attention, these RV will last a long time. I am glad your family is still enjoy the old tent camper! That's just fabulous!