BLM has released a national handbook outlining their Special Recreation Permit process. If you apply for a permit for a permit for an activity on BLM managed public lands, this is the guide every field office in the nation uses as the reference. If you are a vendor, there is a section covering the permit process. If you are a guide/outfitter, there is a section covering the permit process.
BLM has done a reasonable job of provide one document that addresses many questions faced by an applicant.
Click here to download a copy of the Handbook