Should I use cruise control while towing a travel trailer

It depends. Is your truck diesel or gas? If gas it won't likely do very well in cruise. If diesel it will cruise down the road with no issues. I've had both and speak from experience. My 2009 2500 gasser downshifted every 10 miles between Wichita, KS and Holbrook, AZ. My 2013 diesel down shifted once in the same stretch.