During our 20s and early 30s, we carried a pack into the woods. But after one taste of the RV life, we were hooked. Sleeping on the ground became a thing of the past once my husband and I discovered the joys of camping in spectacular settings with the option to enjoy water, electric and sewer utilities. If you’ve ever considered doing the same, here’s what you need to know about plugging into America’s national parks with RV hookup campsites.

Someone who didn't properly close a trashcan is responsible for the implementation of camping restrictions at Many Glacier Campground in Glacier National Park after a black bear got into the garbage.

If you look hard enough, you'll find mathematics everywhere, even in nature. Photographer Rebecca Latson has photographed that geometry, both manmade and natural, during her national park visits and shows you how to see the obvious (and not-so-obvious) lines, angles, circles, arcs and ellipses to improve your compositions and create beautiful national park photos of your own.

Seemingly endless wilderness exists in the National Park System -- 44 million acres, officially -- but how secure are the other 26 million acres that are considered to hold wilderness qualities but haven't gained official designation?