One thing that the internet does well is videos. Watch and learn the gutless method of taking care of a downed elk. Our first few elk were all field dressed like a deer which due to their size is difficult and can be messy especially if a small delay between death and dressing one out. The exploding guacamole is kind of funny except when it happens to you.
If you do a DIY hunt get some good pack frames and have help. It would be very hard to haul one out alone. Of the 15 to 20 elk our group has killed we were only able to get the truck near 1 of them as I recall. Like Alsatian said it is a difficult hunt due to the altitude and terrain. Best to be in good shape and get some good leather boots.