I have been in a similar situation. I am a wrecker operator for the Army National Guard and recently I was sent to PA and VT due to recent flooding, and the unit I am with is an engineer unit who was sent to rebuild the roads. I was sent to drive one of the two M984 A2 HEMTTs that my unit has. Just some back ground on these massive awesome trucks, they are an 8x8 with 54'' massive mud tires. Its powered by a turbocharged and supercharged Detroit diesel, with an Allison transmission, its GVWR is 50,000lbs, and its over 10 foot long. I love driving this massive truck.
Now as I was saying we were in northern PA rebuilding a road that had washed out. They had a call out for the other operators to recover a 20 ton dump that had taken a ****. After about 3 hours I got a call to recover the other wrecker that had grenaded its transmission after it hooked up to the 20 ton dump. Since i am not from PA I did not know the roads so i had a Garmin GPS to help me get around until I learned the routes. So after I hooked up and got back on the road I think my weight was some where near 70 tons I think, and some 40 foot long.
Now the GPS took me the fastest rout back, which led me through some tight county roads and over some very narrow bridges (the wrecker is about 8 foot wide) So this led to some very very interesting situations with two trucks in tow and two points of articulation. There came a point where there was no way for me to turn around and find a new route, a farmer came out and asked why I was sitting there and very effectively blocking the road. I was told that while the next cross street would lead me back to the shop but the bridge I needed to cross would not hold my truck empty, it wouldn't even hold his tractors to get to his fields. So he recommended that I take his path to his fields to get around this bridge.
This path to his fields took me through the creek that the bridge crossed, which was awesome, because I almost got stuck because its that a lot of ass to try and drag through a creek, but all in all I got my truck dirty, 9and i had to use 8x8 lo range) and the trucks back to be repaired. After this incident I sold my GPS and I rely on paper maps and satellite images to plan my routes now.
But my questions is don't they make trucker specific maps and GPS? where they show weight and high limits?
I guess I should have looked at that video when I wasn't half way to sawing logs! I was thinking that the guy was headed to a drilling location......and I didn't see the part about the guy being a Mason Dixon O/O. 
