Check out this
LINK; this guy packs a lot of info about small trailers on this page. A bit old, but it should give you some ideas.
My goal for a small travel trailer was a mobile motel room that would allow me to travel without having to preplan hotel stays. This did not work out for me for a number of reasons. First, I found that my V-6 Ford Ranger was not happy pulling this trailer. The weight was not the factor. Drag was the issue. My gas mileage dropped from a highway normal of 22 MPG down to between 11 MPG and 13 MPG. Second, I found that I was not able to use cruise control. The Ranger would bog down on hills, then drop 2 gears and over-rev. I also noticed the transmission getting warm. I decided that I really didn't want to ruin a nice truck this way. If you do not want to read the entire article, here is his conclusion:
My advice? Get the biggest tow vehicle you can. Start with a small used trailer where you invest very little. Learn about the RV lifestyle on something cheap. Once you really know what you want, then buy the trailer that you think will work the best. This helps you to avoid making what might be an expensive mistake the first time around. Very sound advice: I checked all the numbers (2,3, 4 times) prior to buying our 3500# GVWR trailer. It was only 80% of my V6 (3.9 magnum) Dodge Dakota tow limits. Well under the limits on payload, etc, etc, etc... The Dakota DID the job, but it worked ALL the time. Love that little 18' trailer, perfect size for the me the wife and dog. Love towing it with HEMI Ram, even more.