The official national park portal separates campsites, shelters, ecological centers, village stays, reservation-only trails and programs. Booking methods differ by facility, so first select the park, facility and date, then check whether that item uses a lottery or first-come booking. The reservation and refund section details application periods, stays, payments and refunds. Lottery rounds have their own deadlines; do not reuse deadlines from older rounds. Check winter closures and facility availability separately.