3023 and GMC Safari AWD

I am in the process of purchasing a 1998 3023 in south Florida.  I live in Central Ohio.  I have a 1998 GMC Safari AWD that I plan on using as my tow vehicle.  I would like opinions about this tow vehicle trailer combination.  Also, I will have my Safari equipped soon with a brake controller, and I am considering air shocks for the back, as well as a transmission cooler.  Are these modifications necessary, or worth the money?  I am a little considered about towing the trailer through the mountains on my way back from Florida along I-75.  If anyone has any feedback I would appreciate it.