I think the thread has gone a little sideways from the OP's original question and rather than answer his question it appears to have become more about personal preferences to trailer sizes and brands.
The OP said "thinking about purchasing a used 16' or 17' trailer either a scamp
. I need to know if my vehicle would be up to the task. It has a 3500 lb towing capacity and a hitch weight
of 350 lbs. "
Appears they have no plans to go out and buy a new vehicle to pull a 16' or 17' trailer. I am going to give them the benefit of the doubt and suggest they know that the larger/heavier the trailer the more they are going to notice it behind their tow vehicle.
Lots of folks new to fiberglass trailers and this forum are unaware there are a number of other trailer manufactures out there other than Scamp
to consider, which is why some of us have thrown other manufactures names out on the table for consideration.
How many times have we had someone post here something like this: " Gezzz I finally got to see X Brand trailer at a meet this week - wish I had seen that before I bought my trailer".
The OP's car is if I am not mistaken a 3L 6 cylinder vehicle. IMO it should have no issues with pulling many of the makes/layouts of 16' or 17' fiberglass trailers, with the exception of some of the models of Casita's which looking at the Real World Weight thread
are going to be heavier than what they may want, especially on the tongue and the very popular 17.4 Bigfoot
which is probable the heaviest of them all in the size of trailer they are considering purchasing. Although older model 17' Bigfoots are a bit lighter than newer models.
Another brand name to throw out there is a Trillium
. The OP is looking for a USED trailer and there are lots of folks who love their Trillium
5500 although its a 1' bigger than 17' at 5.5 meters. But it does weigh in within the OP's vehicle specs, all be it to the max.
I know when I was looking for my first fiberglass trailer I was sure based on what I had read here and by looking at pictures, which trailer I was going to buy. Once I saw it in real life and had a chance to look at other brands and sizes I realized I was not going to be a happy camper in the one I originally thought I would be.
I LOVE my current trailer BUT having used it a lot I know it does not meet my future longterm camping needs/wants. Like the OP I want to use the vehicle I already own. So I am happy to hear from folks as to other brands and sizes I might want to consider without the need to buy a new tow vehicle. In my perfect world I would buy another trailer but keep the Scamp
if finances permitted it. :-)
What the OP buys in the end is really totally up to them, it may not be the trailer make or size I would buy but it does not matter, as long as they find the one that fits their want/need list & they can tow it safely with their vehicle, just as those of us who already own a trailer got to do.