The Cardinals spring training is in Jupiter, Florida, which is just north of West Palm Beach.
There's a great state park nearby, Jonathan Dickinson State Park, where you can camp and kayak on one of only two designated National Wild and Scenic Rivers in the state of Florida.
The Loxahatchee River is a gorgeous river that meanders through a subtropical forest that is outstanding.
The park has two campgrounds. Get the one that's deep in the park near the river, if you can. The park's other campground, near the highway, is newer, and the RV pads are outstanding, but there are not many trees. The river campground is nicely shaded, and it's next to the boat launch for the river.