We have a 13 foot Scamp, previously had a 16. Depending on the year, at least one company makes a 3 inch block lift kit for the Dexter Axles. Our 13 is two years old, and as luck would have it, Scamp changed to another brand of axle that year. So we haven't lifted it yet. Sometimes you can buy a new axle for a Scamp with a "down-angle" torsion axle that will create some lift.
You will need to though. A 16 foot rides considerably higher than a 13. Our 13 tends to scrape the plumbing on logging roads and I would say that it is "highway & campground only" as it sits now. This spring I'm going to get the brother in law to help me build a block lift for it. I'll post to the portal with pictures when we get around to it.
Maintenance is just like any other RV or camper. Set it up each spring, pay to dump the black tank, spend a couple of hours prepping it for winter (if it freezes where you live). I recommend that you buys a used Scamp. I had to spend $100s of dollars and many hours fixing up our brand new Scamp when it was delivered. Not much attention to detail in that shop. Scamp was no help whatsoever and told me that they would fix everything for free if I simply tow it to Minnesota. LOL. That's 1500 miles away.
But, the wife loves it. She will only go camping if we take the Scamp.