Burning Man Project has one type of ground anchor that we can provide, install, and remove for you. See images here: http://bit.ly/BMan_Anchors, and read the Building Safe Structures page for more details. You must provide the rigging and turnbuckles to attach your artwork to the anchors.
If you choose to bring your own anchors, you must install and remove them yourself, as we do not have the right equipment to do so.
Contact Art Support Services in advance about your anchoring plan and the number of anchors you need (ass-help@burningman.org).