No licence other than business license to " legally" be a guide.
Depending on where you guide there are rules.
National Forest has limited permits, and guiding in those areas is restricted by outfitter(s).
State land requires permit to operate for a profit.
Private land is subject to landowners control.
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Insurance is usually, though not always, a requirement to operate as a business on most lands.
Unless you have private leases, you probably should try to get started with an established outfitter.
