Mississippi River - Pools 11-22 · Illinois
Overview Thomson Causeway provides the unique experience of island camping on the great Mississippi River and it's well worth a try! The western edge of the recreation area offers visitors an unobstructed view of the widest spot on the Upper Mississippi River Basin, 3. 5 miles from shore-to-shore.
Sites at Thomson Causeway are reserved through Recreation.gov. Sites here can be reserved in advance through the official system, and they are claimed fast — cancellations then trickle back all season, unannounced, at any hour of the day or night.
| Total sites | 133 |
|---|---|
| Site types | Standard, Tent only, Group, Picnic area |
| Hookups | Electric hookups at some sites |
| Location | Thomson, IL |
| Book through | Recreation.gov |
| Official listing | Recreation.gov |
Because sites are booked months ahead, a steady share of reservations get cancelled as trips fall through. Each cancellation instantly returns that site and those nights to the official calendar — first-come, first-served, no waitlist, no announcement. Refreshing the booking page yourself, every few minutes for weeks, works in theory. In practice, the people who get these sites are the ones who hear about the opening first.
ItOpened scans the Recreation.gov calendar for Thomson Causeway around the clock. When a site matching your dates and your vehicle opens, you get a text with a direct link to it. You book it yourself, in your own account, at the normal price. We never book, hold, or resell — your fee pays for monitoring, and openings are first-come, so speed is the whole game.
| Grant River | Cancellation alerts available |
|---|---|
| Fishermans Corner | Cancellation alerts available |
| Shady Creek | Cancellation alerts available |
| Clarks Ferry | Cancellation alerts available |
| Blanding Landing | Cancellation alerts available |
| Bulger's Hollow Recreation Area | Cancellation alerts available |
| Blanchard Island Recreation Area | Cancellation alerts available |
Page data refreshed 2026-10-29. Site facts come from the official directory listing for Thomson Causeway; cancellation statistics come from our own scanning logs.