RE: I want my little piece of colorado elk too.
The camper that you choose will need to be your personnal decision. My family has always used tents because you can get "further in" so to speak. With afifth wheel camper, or any trailer, you're limited to how far into rough country you can get into. Some people go that route and then use ATV's to get further in on the rougher roads. So much of the forest roads aren't much more than rough jeep trails.
A pop up probably isn't a bad choice, but more than 2 or 3 guys in it, along with all thier gear, would be a house full I'd think. Being able to get back to camp and be comfortable is a necassity, IMO. Ifyou can't get good R&R at camp, along with good eating, then hunting hard for several days straight really can get a hunter down.
Also, with a pop up, I'd still guess that you'll need a small trailer of some sort to not only haul stuff(coolers, propane bottles, etc.)that you may need, but also to haul your meat and antlers back home.