Drags are not to popular in North Dakota, because there often isn't enough obstacles for the drag to catch on to. Your coyote could go to the next zip code before the drag stops him. The earth anchors are gaining in popularity, because they work and they consume less space and are easy to work with. Another concept that I expect to see used more is slide wires. The set-up here is a 14 ga or so wire anchored on both ends with your trap attached via a drowner attachment. Your animal can only move down the wire into whatever heavy cover you want him to be in (e.g. cattails, phragmites, etc.)