jajohnson, there isn't an awful lot to "normal" hy FE driving.
1)Use the CC except when going uphill. DC the CC and coast up the hill-let the downslope+ a quick blip of the throttle to get you back to speed.
2)Never use the roof rack.It is much better to put an outside load in a hitch carrier behind and low than on the roof.You can ever jury rig a bike hitch carry to carry 'stuff" other than bikes.
3)Try to drive at 68 or so on the interstates. It is just too unnerving to drive 60mph or less when the average speed is 70+.
4)Take advantage of work zones(45mph) to actually drive just 45mph.They will improve your mpg.
5)Keep your tire pressure up to at least the recommended pressure.Check every 2 weeks-all tires lose air.Some folks go all the way up to the max on the sidewall. Depends on your comfort level,but I would guess a heavy vehicle like an HH would be comfortable with pretty high pressure in the tires.
6)It is usually easier to find 5W30 Mobile 1 than the 20W. I use the Mobile1 5w30.Makes me feel better. In general Mobil 1 will stay in grade longer than petro based 'regular" oils.
Luck,Charlie