For Experienced 1/2 Ton 5'ers

This past winter while snowbirding in Florida I spoke with 2 different gentlemen that pulled their 5th wheels with 1/2 tons. I was quite surprised because both of their 5th wheels were larger than my 25' Cardinal (actually about 28'). My empty weight is about 8,700 lbs. and both of their units were slightly heavier and longer than mine. One fellow pulled down from Wisconsin and the other was from Indiana. They said they maintain a steady speed (about 62 mph) and didn't seem phased by smaller hills. I didn't get into the specifics of their truck set-ups relative to suspension or engine modifications, but I don't think these guys seemed the type to put much money into their trucks.