One nice thing about having a smart phone is, as long as you have your phone you can snap up photos of stuff like this.
Here are a coupe other guys I passed while traveling:
While I went looking for the previous photo I found these from a couple other trips:
And then there was this guy - which maybe also pushing the limits of his equipment. That triple axel Raptor has gotta weigh at least 16K by itself!
It was mentioned earlier about the legality of it. Each state has its own rules so if traveling across lines you have to consider the more restrictive law. Louisiana is 70' total - Mississippi is 99', but I used to live in TX and their website said 65' total counting the tow vehicle for regular driver license. All the states I travel in the south allow triple towing but there are others around the country that don't.
Although I sure see a lot of rigs longer than 70' here in Louisiana. I guess it is not something that officials must be worried about or i live among a bunch of law breakers that done care -
(So using conservative numbers) Obviously 40' Rapture toy hauler and 20 ' boat plus the 18' truck would be over the limit in TX.
Something else to consider!
Anyway I found this interactive site that lists each state rules.
Towing World Official Website