If you need to change the dates of your reservation, use these simple steps:
  1. From www.recreation.gov, click Sign In or Sign up in top right corner 
  2. Type User Name and Password and Sign In
  3. From links on left, click Current Reservations
  4. Click See Detail button for appropriate reservation
  1. On right of Site/Reservation Details, click Change Reservation link
  1. Click Change Date/Transfer to Another Site button
  2. Update arrival date or length of stay from site's Availability Grid
  3. Click Book these Dates
  1. Confirm changes in Change Reservation Details screen
  1. (Optional) Update Equipment or Site Occupants
  2. Read Know Before You Go
  3. Check box beside Yes, I have read and understood this important information
  4. Click Continue
  5. If reservation is more expensive, check new price  and enter Payment Information
  6. Click Confirm