We tow a 26' Haulmark Edge race trailer behind our 40' Dynasty and love it. It does however, have some drawbacks. Campgrounds/sites are limited. I have found that if I can make reservations early enough in the year for future trips it is extremely beneficial. Spur of the moment trips can be hit and miss, usually miss, on getting a site large enough. I hate dropping the trailer at campgrounds although I have done it on a few occassions.
That said, we don't full-time so we carry our 04 Harley Ultra Classic and our 2011 Jeep Unlimited along with all of my tools.
I would definately get a trailer with an extended tongue and make certain it has electric brakes on BOTH axles. Other than that there are tons of options and manufacturers out there. Also, I have found it helpful to layout your cargo in an area marked out on the ground to really determine the size trailer you need vs. what you think you need. You will be surprised and will more than likely be needing a trailer a couple of feet longer than originally planned. We have gone from a 22' for a very short time, to a 24' for sixteen years and now a 26' for the past five years.
If you have any specific questions feel free to ask as I have towed multiple enclosed trailer behind all three of our coaches now for over 20 years of RVing. No regrets on towing the trailer although we do flat-tow at times as well. It really depends on the trip plans, whether we will be bouncing around a lot or staying at one location for several days/week. Also depends on whether or not we are taking the bike. I prefer to pull the trailer but I won't lie to you, it can be a bit of a nuisance compared to flat-towing.
Mike.