Campsite Odds

Booking odds · September

Trimmer Campground in September: How Hard Is It to Book?

Trimmer Campground · CA · Pine Flat Lake

The verdict

Easy

Booking difficulty 3 out of 10. Usually available — you can often book close to your trip.

Rarely sells outBased on 3 years of reservation data

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

Trimmer Campground in September scores 3 out of 10 for booking difficulty — easy. Usually available — you can often book close to your trip.

Across the last 3 years of reservation history, the typical September booking was locked in about 3 days before arrival, with the campground running roughly 36% full that month. The lightest arrival day is Tuesday, so shifting to a midweek start is the single easiest way to improve your odds.

Lead time

How far ahead people book

Same day: 29% of bookings29%Same day1–3d: 21% of bookings21%1–3d4–7d: 5% of bookings5%4–7d1–2wk: 8% of bookings8%1–2wk2–4wk: 20% of bookings20%2–4wk1–2mo: 9% of bookings9%1–2mo2–3mo: 2% of bookings2–3mo3–6mo: 5% of bookings5%3–6mo6mo+: 1% of bookings6mo+Median booking lead time: 3 days ahead
Demand split

Weekend vs. weekday demand

Weekend (Fri–Sat)Weekday (Sun–Thu)

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

Booking window · September 2027

When September reservations open

Reservations for Trimmer Campground in September 2027 operate on a rolling 6-month window releasing at 7:00 AM ET.

September 1 stays open

March 1, 2027

at 7:00 AM ET

Release style

6-Month Rolling Window

Releases daily 6 months ahead at 7:00 AM ET

Campsites for September 1, 2027 become bookable on March 1, 2027 at 7:00 AM ET. Each subsequent date throughout September 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.

Plan B

Easier nearby options in September

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

ISLAND PARK

CAEasy

Crystal Springs Campground (CA)

CAEasy

SUNSET CAMPGROUND (CA)

CAEasy

FAQ

Trimmer Campground in September: common questions

How hard is it to book Trimmer Campground in September?
Trimmer Campground rates 3 out of 10 for September — Easy. Usually available — you can often book close to your trip.
How far in advance should I book Trimmer Campground for September?
The typical September reservation was made about 3 days before arrival, so plan to book as early as your dates allow.
When do September reservations open for Trimmer Campground?
Reservations for Trimmer Campground in September 2027 open on a rolling 6-month window. Sites for September 1 become bookable on March 1, 2027 at 7:00 AM ET, with each subsequent day releasing day-by-day 6 months ahead.
What is the best day to arrive at Trimmer Campground in September?
Arrivals are lightest on Tuesday. A midweek arrival is usually the easiest booking.

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