Like Seafarer, I am using a utility trailer with Thule kayak cradles. I love the utility trailer for carrying gear that accompanies a Hobie Mirage, along with other gear. Especially important for us with 2 dogs in the car, one who must be crated.
A few other notes:
Two Adventures are a little heavy for the span of the Thule Racks. I have added support in the middle. I saw another guy who used Yakima racks. The cross tube seems to be stronger with Yakima and may not need the support.
I have also added carpet to the Thule cradles, as the black rubber will discolor a light colored hull, if you permanently store the boats there. If you only travel with them in the cradles, it shouldn't be a problem.
A cargo net (as used on a Yakima roof rack or for a pickup truck) helps keep any contents from bouncing or blowing out.
A PVC tube works great for holding the sails.
Trailer is made is a Versasport trailer, made by Snowbear, but I don't see that exact model anymore. Mine is 2yrs old. Look at Snowbear.com or versasporttrailers.com. I got mine at Costco. Snowbears are readily available at Home Depot. Costs range from $650 to $750 for the trailer.