Got to the Wa State Park web page and read up on it there..
http://www.parks.wa.gov/955/Possible-Government-ShutdownYes, you might not get your refund right away, but you'll get one, even if you cancel before hand....
Here is a quote from the site directly.
"Please note, if parks are closed due to shutdown and you haven't cancelled your reservation by 8 p.m. on your arrival day, refunds will have to be made by State Parks staff rather than through the reservation system. In this case, refunds would be significantly delayed; refunds would be processed when staff return to work."
My July trip isn't until later in the month, so hopefully the DA's in Olympia can figure something out... ;)
Mitch