If you look at the angled roof-line from a distance, you will see that the AirCon and everything else on the forward roof is lower than the rear roof...and the highest point there are the roof vents over the garage and loft.
Thor/Damon has always said the height of the Outlaw is 12'11" and I checked that with a 2x4 across the highest point and tape measure.
On level ground, my Outlaw is just under 13' and I travel very light, using the garage as a kennel, vs. moto's or quad's in the garage that would lower the rearend.
If you have any doubt (like I did) you should measure it, but for day to day driving, I use 13" for my height.
BTW, I just stumbled on to this post...I usually ask questions of the brain trust on the http://www.irv2.com/forums/f120/i-lo...aw-102560.html
Best of luck