17 years in a tent trailer, 5 years in a hybrid and now 11 years in our current trailer. When it comes to "camping" the hybrid can't be beat, in my opinion. You are outside, under the canvas with plenty of fresh air to breath and good beds to sleep on and a bathroom with a shower. We loved our hybrid but.....
As we neared retirement we knew we would be hitting the road for far off places. We did take the hybrid on long trips but those were spent at campgrounds for a couple of days, or more, at a time before moving on. We also camped mainly in the summer to accommodate the kid's school year. It worked really well.
Going camping and traveling are two different things. We have over 50K miles on our current trailer. We can go out in the cold early spring and the cold and rainy fall. While on the road for hours at a time we can stop somewhere to have lunch, use the bathroom and be on our way in the matter of just minutes. No need to avoid the cold and no requirement to set up the tent ends and store them away when wet as we are moving to our next destination.
If, you are planning on camping with your son, a hybrid would be perfect. Again, we loved ours and never regretted owning one. Your plan to get a used one, use it for a few years and then maybe get something different is a good one. Best wishes.