You'll likely need a
neutral bonding plug (<googler search results link) to keep the EMS happy.
Widely available or relatively easy to make one DIY. With that in place the use of the generator should be 'transparent', just as if plugged to shore power (within output limits
).
Note the 'bonding plug' does not need to be 'between' the generator and the trailer, just plugged into any available outlet on the generator and yes applies to 'inverter generators' also.
Yep,
there's threads here on the forum discussing them, too.
Hope that helps, Have Fun!