Welcome to Classic Bronco eaglebear.
Yes, If you're limited to 5000 lbs, you're likely to go over that by carrying it on a trailer.
I've flat towed mine behind a motorhome a lot.
Mine tows great, but I think the biggest issue is when the Bronco has a lot of suspension lift. Mine only has a 2" lift.
The other issue is with the tow bar. It needs to be attached to the Bronco low enough so the tow bar inclines slightly upward from the Bronco to the ball. That way under hard braking, the tow bar actually levers the front of the Bronco down to the pavement rather than try to climb off the ball.
I opted to tie the lights into the existing Bronco turn signal and clearance lights instead of using auxiliary tail lights like you see some use. When you're towing at night, it's reassuring to see the clearance lights on the Bronco behind you.
I've seen some use a bungie cord to the steering wheel to keep it centered, but I didn't need to. Mine centered itself just fine after turns.
You'll need to disconnect your rear driveline to keep from spinning the transfer case output shaft. It only oils when the input is spinning.
I like to pull the rear driveline out altogether and put it in a garbage bag in back of the Bronco. For short trips, I use the front drive. If I want to do some wheeling, then I put the driveline back in.