anyone double tow with an idi?

Hi guys I just bought a 25 ft fifth wheel camper and it has a hitch already installed I alsl have a polaris ranger that goes on my 8x10 flatbed. What I am wanting to do is pull this combo from az to idaho in oct when elk hunting is open. Does anyone do this kinda towing here? Im sure these trucks will pull this kinda load. Anything I should do to prepare for that trip?
Thanks