There are just too many variables in this topic for it to be covered easily or quickly.
888: You need to steer away from thinking about the stakes so much and think of this as a whole ?fastening? system.
There are a whole lot of variables. Since you have to hold on to coyotes you?ll need a pretty good fastening system because they?ll test a system to its limits.
You asked about chain length. You can use a long chain if you want, up to say 3 feet. A longer chain can help to preserve a set area. By the same token a longer chain allows the animal to lunge more against the trap. It could escape or injure itself. I would recommend a shock spring in a longer chain.
Some trappers, including me, prefer a short chain. Short chains prevent lunging and shock springs are unnecessary.
But there is another factor. Coyotes can stand on their back legs and pull straight up on a trap. With a short chain, you need a solid ?staking? system. Cable stakes have been recommended and they are good. You asked about cross staking and I?ve included an illustration. If you are going to hold a coyote on a short chain, with a single stake, it must be extremely long. Nothing less than 24 inches will do, and frankly I personally wouldn?t trust single 24? stakes to hold a coyote. With crossed stakes, you can use two shorter stakes. Crossed 16? stakes will hold in most conditions.
If you want to use a longer chain, then you can get away with a single stake, because the coyote can?t get a straight up pull before it runs out of chain. It kind of boils down to this, you?ll need extra stake or extra chain. It?s really your choice.
If you have any more specific question about this, don?t hesitate to ask.
Anybody else care to contribute?
-- Hal