BLM rules and regulations for Wilderness Areas are codified under…
§ 6305.11 What alternatives to granting access will BLM consider in cases of State and private inholdings?
To reduce or eliminate the need to use wilderness areas for access to State and private land, BLM may –
(a) Accept donation of the inholding, or
(b) Acquire the inholding from the owner by an exchange for federally owned land in the same State of approximately equal value or, if the owner concurs, by purchase.