Welcome to the forum, Sue! This is a great place to gather information, and the folks are really friendly and helpful.
What's your Forester rated to tow (trailer weight
& tongue weight)? It has varied over the years. I'd read the whole section of your owner's manual that pertains to towing, because there are usually caveats about specific equipment on the vehicle or trailer (like brakes).
I'm thinking you are probably looking for a basic 13'er with brakes
. BTW - a 13' designation actually means a 10' cabin with a 3' tongue, like mine. A 16'er - with a 13' cabin - is likely going to be too heavy for your Forester. Check out the thread "Trailer Weights in the Real World" in the General Chat area to get a better idea of what's realistically possible.
Fiberglass eggs seem pretty common in the NW, but they sell quickly, so I'd keep a close eye on your local Craigslist - many nice ones sell locally before they show up on the big nation-wide web sites (like this one and fiberglass-rv-4sale.com).
Good luck in your quest!
Sent from my iPhone using Fiberglass RV