"If you sign this contract without having first inspected one of the membership camping operator's campgrounds, you may also cancel this contract at any time prior to midnight of the 10th business day after date of purchase by mailing or delivering the signed and dated attached written notice of cancellation or a copy of the contract when that contains the cancellation instructions together with the original camping club contract, membership card and any other evidence of membership."
Ca. Civ. Code § 1812.304