Campsite Odds

Booking odds · May

Adirondack Shelters in May: How Hard Is It to Book?

Adirondack Shelters · MD · Catoctin Mountain Park

The verdict

Plan ahead

Booking difficulty 6 out of 10. Books up in the weeks before popular dates. Reserve early.

Rarely sells outBased on 3 years of reservation data

May rarely sells out — you can often book close to your trip.

Adirondack Shelters in May scores 6 out of 10 for booking difficulty — plan ahead. Books up in the weeks before popular dates. Reserve early.

Across the last 3 years of reservation history, the typical May booking was locked in about 38 days before arrival, with the campground running roughly 48% full that month. The lightest arrival day is Wednesday, so shifting to a midweek start is the single easiest way to improve your odds.

Lead time

How far ahead people book

Same day: 4% of bookings4%Same day1–3d: 10% of bookings10%1–3d4–7d: 8% of bookings8%4–7d1–2wk: 10% of bookings10%1–2wk2–4wk: 14% of bookings14%2–4wk1–2mo: 10% of bookings10%1–2mo2–3mo: 8% of bookings8%2–3mo3–6mo: 32% of bookings32%3–6mo6mo+: 3% of bookings6mo+Median booking lead time: 38 days ahead
Demand split

Weekend vs. weekday demand

Weekend (Fri–Sat)Weekday (Sun–Thu)

Best odds: arrivals are lightest on Wednesday in May. A midweek arrival is your easiest booking.

Booking window · May 2027

When May reservations open

Reservations for Adirondack Shelters in May 2027 operate on a rolling 6-month window releasing at 7:00 AM ET.

May 1 stays open

November 1, 2026

at 7:00 AM ET

Release style

6-Month Rolling Window

Releases daily 6 months ahead at 7:00 AM ET

Campsites for May 1, 2027 become bookable on November 1, 2026 at 7:00 AM ET. Each subsequent date throughout May releases day-by-day exactly 6 months prior to arrival.

Facility note: Standard Recreation.gov 6-month rolling window: sites become bookable 6 months before arrival at 7:00 AM ET.

Fees

How much does it cost to camp at Adirondack Shelters?

Shelters are free. However, to cover the cost of online services and the use of recreation.gov you will incur a non-refundable fee. You will pay $8 if your reservation is made through recreation.gov online and $10 if made at recreation.gov’s call center, (877) 444-6777 (toll free) or (606) 515-6777 (international) 10 a.m. – 12 a.m. (Eastern Time Zone).

Fee details as listed on Recreation.gov. Rates and passes change by season, so confirm the current price on Recreation.gov before you book.

Plan B

Easier nearby options in May

If your dates are flexible, these nearby campgrounds are typically easier to book.

Antietam Creek Campsite

MDPlan ahead

McCoy's Ferry Campground

MDPlan ahead

GREENBELT CAMPGROUND

MDEasy

FAQ

Adirondack Shelters in May: common questions

How hard is it to book Adirondack Shelters in May?
Adirondack Shelters rates 6 out of 10 for May — Plan ahead. Books up in the weeks before popular dates. Reserve early.
How far in advance should I book Adirondack Shelters for May?
The typical May reservation was made about 38 days before arrival, so plan to book as early as your dates allow.
When do May reservations open for Adirondack Shelters?
Reservations for Adirondack Shelters in May 2027 open on a rolling 6-month window. Sites for May 1 become bookable on November 1, 2026 at 7:00 AM ET, with each subsequent day releasing day-by-day 6 months ahead.
What is the best day to arrive at Adirondack Shelters in May?
Arrivals are lightest on Wednesday. A midweek arrival is usually the easiest booking.

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