A monthly Sand Dune membership is available for those interested in using the dune multiple times per month. In order to ensure online reservations are honored, Sand Dune Members will be allowed on the dune 10 minutes after each reservation time slot if it has not reached its capacity of 10 people. A picture ID must be presented and will be checked to verify patron as a Sand Dune Member. Membership entitles members to 50 minutes of dune usage. Memberships cost $20 per month and must be purchased online. Only 10 memberships will be sold per month. Memberships expire at the end of each month.