I expect that the answers you get will be just like an oil thread.
Anyway, I've pulled 3 different makes of trailer. All three were production trailers as opposed to home made.
1. fibro concept http://www.fibroconcept.com/en/
2. sarasota shadow http://www.sarasotatrailers.com/shadow.htm
3. forest river 3x5 http://www.forestriverinc.com/nd/default22.asp?page=luggage&nav=cargo
Once I figured out to run 13-17 lbs of air in the tires, all three towed true and well. If you run too much air in the tires, the trailer bouces all over the place when you hit dips and bumps in the road.
We just installed an mchitch on our 09 Ultra. Installation was easy and the price seems decent as well. They're great to deal with as well.
Here's a link to them. http://mchitch.com/Harley_Touring_Receiver_hitch_w_bumper-2009.htm
I'd suggest the big things to remember when towing a trailer are taking your corners wider than you're used to and loading the trailer so that the tongue weight is right. After a couple of times loading the trailer it becomes second nature anyway as far as weight distribution is concerned.
Good luck and enjoy your travels.