Since I use my Bachman so frequently, especially when solo top-roping with my SoloAid, I just daisy chain and rack it with its own oval and autolocking biner.

NOTES: The Bachman knot works best with oval carabiners. It works poorly with biners that have non-circular cross-sections (e.g., HotWires). If I have to use the Bachman oval for something else, I can use a Kleimheist (K) for my backup knot. The Kleimheist locks tighter and sticks more than the Bachman but doesn't require that extra biner. I never use a Prussik for rappel backup--it's too hard to unlock when weighted.

WARNING: CLIMBING IS INHERENTLY DANGEROUS. THE OPINIONS AND DESIGNS PRESENTED HERE ARE MY OWN AND DO NOT CONSTITUTE A RECOMMENDATION OF OR ENDORSEMENT FOR ANY PARTICULAR OR GENERAL USE. IF YOU CHOOSE TO USE ANY DEVICE OR PROCEDURE PRESENTED HERE, YOU DO SO AT YOUR OWN RISK.