Welcome to the Forums, from a HW276 Owner.
Be really mindful of your Popup's Tires - especially since the Great Basin and Colorado Plateau offer SO MANY Great Camp Sites but So Few of them without needing to traverse Gravel and other Forest / Desert Roads.
All of the Highwall Series are designed both to be Heavy and right at the Tire Load Limit. And yet, with the larger Freshwater Tank and the significant Storage Space of a Highwall, you'll be sorely tempted to Overload your Popup - especially if you are looking to visit a Dry Campground.
So, Enjoy your HW277. Just remember to Keep It Below 65MPH on the Highways, and to Drive Slowly and Gingerly down those Gravel and Dirt Roads!!
Pup: '11 HW-296
TV: '09 RAM 1500 Hemi 4x4 CC