Re: deck height concerns
I would try and keep the total height under 13' 6", as TygerCub said. This is sort of a standard maximum height. Eighteen wheeler trailers are 13' 6" high, so you would be able to go pretty much anywhere they do. There are vehicles that are over 13' 6" high, however they have to be cautious of bridges and low wires, and are subject to permits and restricted routes. That being said, there are some bridges that are under 13' 6".
My full size bus is 10' 3" at the crest of the roof, I'm sure most are comparable, so you may be alright, as long as you exercise caution when driving. A trucker's atlas will list low clearances on most major routes.