Thank you all. Main concern was that the tongue weight would drop the back end and the headlights would point for the sky, which is why we're replacing the current vehicle to begin with (2011 Ford Edge). If it was really going to be an issue we were open to an expedition, but that's a bigger vehicle than we'd like if it can be avoided.
I will look at an anti sway bar for it.
There are brakes, and we'll be moving our P2 Controller into the explorer. They're apparently pre wired and we'll probably just have the dealer install it while they're prepping it.
Thanks!
Pat