Old-Biscuit wrote:
"Possession of Alcoholic Beverages: Exceptions
23229. (a) Except as provided in Section 23229.1, Sections 23221 and 23223 do not apply to passengers in any bus, taxicab, or limousine for hire licensed to transport passengers pursuant to the Public Utilities Code or proper local authority, or the living quarters of a housecar or camper."
Old biscuit has it right, the quote is from the California vehicle code, and note the Vehicle code calls a Motorhome a" housecar " SO 23229 Applies to alcohol in the living quarters of your MH. It is legal.