Re: newby- help!
First of all, you need to determine the tow capacity of your tow vehicle. That will help. Next, you should know that the weight of the trailer is bare weight without any options. a/c, awning, propane tanks and spare tire (yes the spare is sometimes considered and option) will add up quickly. Yes dealers claim their units are best. Furthermore, most sales types, not all but most, will assure you that whatever you're driving will adequately tow whatever they're selling.
Another consideration is service after the sale. I once was looking at a trailer and while inspecting the stove, a salesman came over and informed me he didn't like me messing around with their merchandise. Now with an attitude from sales like that, I wondered what the service department would be like. I didn't wonder long because I immediately waked out the door and drove a couple of miles where his competitor releived me of a few thousand dollars. And the service dep't. there was great, too.
Are you considering a hard side travel trailer (TT), a folding one? Trailmanor and Hi-Lo makes folding trailers that will fit in a garage. Some of the smaller units consider a full bed to be 48 inches wide. A full size bed in your home is 54. As for brands, I'm sure you will get answers here.
Good Luck