Also, what about height? This unit is 13'4", are there any overpass or tunnel issues with it?
Yes. As Jim says, most eastern states set 13'6" as the standard underpass height, but there are a number of exceptions for older underpasses that existed before the 13'6" requirement and places where it simply wasn't feasible. They will be marked. Also some gas stations and such with covered drive-thrus may be under your height - 12'6" is not unusual. In other words, you will have to keep your eyes open overhead.
Newer highways will have higher clearances, typically 15 feet or more wherever feasible. Western states generally follow the newer standards because the road systems were designed and built later than eastern regions, which have roads dating back to colonial times.
You will also have to be extra cautious of low hanging tree limbs, utility wires and such in & near campgrounds.Everybody has to, but at 13'4" you will be more at risk that most.
We had a high profile(13'2") fiver for two years and had to make a few detours on highways and were invariably scraping tree branches in wooded campgrounds. Not a traveling disaster, but definitely requiring the driver to be observant at all times.