Your Ram should pull that load without a problem even with the reduced power you'd have available in the mountains. Here in our county you'd be running at roughly 21 to 24% less power than you have in Iowa, where elevation is about a thousand feet. So don't think of it as bogging down, it's just going to be working harder. No need to push it.
It's so nice to have someone with plenty of truck asking the question. Still don't forget to check the load you will carry inside the truck, that is another important factor.
And if you come to Colorado, or any mountain state, remember to use your truck's gears and exhaust brake, if equipped, on downgrades. The less you use your brakes, the more effective they will be should you really need them. Be sure your brake controller is set properly with your truck loaded as you expect it to be.
Did you get your Jayco in Davenport? We did.
'11 Eagle 320RLDS
'02 F350 PSD Dually 4WD
DW's Ride, '13 Expedition