Just some random thoughts from someone who pulls a trailer for her kayaks (or puts them on the roof of the toad)
Vertically behind a Class C limits you to some fairly short kayaks. Unless you use a livery service for spotting - you're probably paddling on a lake or big water - the longer the kayak, the better.
Inflatables like the Sea Eagles can get unruly if a sudden storm comes up - you may not be able to overcome the effect of a strong wind on something that "high profile". Watch the weather closely.
Skin-on-frame kayaks closely duplicate a hardshell kayak's paddling ability; but they cost more than a hardside.
Some inflatables come with skegs (fins) for better tracking ability in open water - but these things are stinkers on twisty rivers where you might need to slide over a fallen tree trunk.
Here's my trailer - it cost less than $1000 and hauls everything I can think of. The photo was taken at a U.P. Michigan week of paddling, and I brought 2 boats for myself; plus a couple for friends. I'm just not ready to give up my 16' sea kayak when it comes to big water...
