I do mine very similar to Smokepole's method.

Don't use anything waterproof. You need it to air dry to prevent bacteria from growing on it. Normally Rocky Mtn nights are plenty cool enough if the meat is just hung. The low humidity lets the temps drop much faster and lower than a humid climate. It's not unusual to hit 70 or 80 in the daytime and frost at night.
Unless there are bears or wolves in the area, I suggest hanging overnight with the long bones in the quarters. That makes them easy to hang plus reduces exposure to bacteria.
They always say to hang meat at least 10' up. Yeah, right. Ever actually tried it? It'll take you longer to get an elk 10' up than it takes to just pack it out in the 1st place.


β€œIn a time of deceit telling the truth is a revolutionary act.”
― George Orwell

It's not over when you lose. It's over when you quit.