Actually, the tool trailer does need 220 volt service for two of my tools. That is the reason for all this. There are several ways to achieve this. The cleanest way is to connect to a 50 AMP service at the pedestal - assuming (and testing) that a true and properly wired 50 AMP service is being delivered.
Another is to grab two 110 volt outlets wired out of phase with one another. There is a fellow in Arizona that makes such a box.
Another way is straight from the generator, assuming it delivers 220 volts.
The Buddy Box delivers two 50 amp 110 volts circuits. That can't service either my coach or the tool trailer. But thanks for the tip. Good to know there are such things out there and it helped to better understand what parks deliver and how it can be used.
As for my DSDP, my understanding is that the coach has one AC on one hot leg and the other AC on the other hot leg. So strictly speaking, nothing in the coach uses 220 volt directly, but does make use of the two hot legs of the 220 volt pedestal outlet to balance the electrical load in the coach.
I stay in a park for some time as I am working in a community for a year or so before moving on. I plan to carefully test the electrical service before agreeing to stay in that park. I don't get to travel around often as so many of you do - yet.