If you anchor in areas that include rocks, reefs, wrecks, or other items that can snag and hold an anchor, attaching the clevis to the head of your anchor might be a good idea.
The idea is that you attach the clevis to the eye at the head of the anchor, then run the chain back to the eye in the end of the shank and attach it with some zip-ties to create a "break-away" ability.
If the anchor gets stuck, you can cleat off the anchor line and use the motor to move forward on the line... When the force on the line exceeds the breaking strength of the zip-ties, they break.
That leaves the anchor line attached to the fluke end of the anchor, effectively reversing direction and pulling it out backwards.
If I were doing this, I'd put some 100 to 120# cable ties on and give it a go.
http://www.buycableties.com/catalog/?pid=40
Use 4 ties to start and see how that works, keeping a lot more on hand for 'repairs' when you need it (because you probably will).
Unless you have the ability to intentionally hang up your anchor and test it, trial-and-error are about the only way you will know how many zip-ties are strong enough to hold your boat in bumpy seas, but also weak enough to break and release it if you get stuck.
Hope this helps.