Rules of the Road
Lippert makes 98% of the trailer frames. They will tell you NO to towing a 2nd trailer.
Your sway control is only for 1 trailer, the trailer connected to the truck, not the 2nd trailer.
Most states restrict or do not allow towing 2 trailers. See above link.
I'm going to guess that the utility trailer has no brakes. What frame do you think is going to take the stress of stopping that 3,000 lbs? That would be the rv frame that was never designed to do that. If the utility trailer has brakes, you need to modify and adjust utility trailer brakes so the utility trailer will not jack knife behind the rv.
The added weight of the utility trailer hitch on the bumper of the rv reduces the weight of the rv hitch on the trucks "bumper". This can reduce sway control
and cause porpoising of the rv and truck.
You asked the question of "safely tow". You are NOT driving a semi, you'r towing an rv with a pickup truck.
You say you want to take a golf cart or a quad with a tt, put the golf cart or quad in the pickup bed, then connect the tt to the truck. If you have a short bed, have a bed rack made for the golf cart.
Check with the rv and/or state park your going to. Alot of them do not allow quads or gas powered golf carts. You people are too noisey. Ya, I'm OLD.
Yes people tow two trailers. This is usually done with a 5th wheel. Oh ya, Lippet still says NO to towing 2nd trailer with a 5th wheel.
Them engineers don't know anything.
I hope this detailed explanation of my answer of "NO" helps you make a "safe" choice about towing a 2nd trailer.
Oh ya, you could always have DW tow the utility trailer with a 2nd vehicle. It's only