In preperation for our upcoming vacation to Lake Hartwell GA this week with our camper in tow. I have to car top the Ultimate Tandem Island (the name of my boat).
Here is our Camper (pic taken at our last outing):

Now we are traveling all the way to Georgia so two vehicles is out of the question, so we have to car top the TI.
This is the current system I have:



Notice the 8 ft vinyl coated wood closet poles that I picked up at Home depot (they were free because they couldn't find the UPC code at the checkout (their problem not mine) I waited at the checkout for 15 minutes, they finally just said, go ahead and take them (free), because they couldn't figure it out (lol)... They are perfect to support the boat on the roof, nice and strong, and distribute the weight perfectly. The poles are just laid into the grooves under the boat after I put the boat up on the roof. Notice the dirt on the bottom, that is left over staining from my planing hull mod that was mounted on the boat for a couple three years, now removed to make the boat lighter (about 8-10 lbs) so I can get it up on the roof, nothin wrong with it, it was designed to be removable, I just won't need it up at lake Hartwell.

The boat is extra secure up there (doesn't budge at all), and should survive the trip nicely. I loaded the empty bare hull onto the Thule Aero bars. It was actually not hard to get up there by lifting half the hull at a time (about 50 lbs lifting). I loaded it all by myself.
I then put the AKA bars and AMA's onto the boat (as good a place as any to store them). Of course they will be removed before I take the boat down.
All my massive sails are stored between the hull and AMA's and tied in nicely so they don't blow around.
The orange ratcheting straps I got at Home depot a set of 4 were $13 bucks, they hold 1300 lbs ea. and everthing is strapped to the lifting lugs in the truck bed.
I have a cut up pool noodle under the bow to prevent it from bouncing, and a V strap on the bow to prevent sideways movement. On the bow I used rope instead of straps, because on our old setup the 1 inch wide bow straps would flutter and vibrate in the wind on the highway.
Once we get to our destination I will take the boat down, and throw the boat in the back of the pickup every day using our hitch extender (saves having to throw it on the roof).
The motors we will likely just store in the camper during the trip up there (they only weigh 27 lbs ea).
To the best of my knowledge, this is the only car toppable complex sailboat I know of, (complex meaning with massive sail sets (ie..spins, jibs, etc)). I would like to see someone do this with a 450 lb Windrider 17 ( lol).
We have never been to Lake Hartwell, from my understanding it is huge, and we should be able to cover quite a bit of it averaging 8-10 mph even if there is very little wind (we pretty much expect little to no natural wind up there during most of our stay), so we will need to make our own wind ( lol).
I just thought I would share our setup, in case anyone wants to do something similar.
Here is a pic of one of our old tow vehicles (we are now on our forth tow vehicle (all GM Denali's (we keep wearing the darn things out))).

This will likely be our setup if we want to just kayak inlets while up there.

And here is my typical local setup with the trailer (when we don't have to car top....way less time to rig), we live only a few minutes from the ocean.

I know of no more versatile boat that you can literally do everything you can think of with, 'One boat, that does it all', sure beats the three kayaks that we used to carry on the roof, way more versatile, and can be used in big water... yea we love our TI...
FE