We went to Mt Rainier last June and could not get into the NP CG which was crowded. We stayed at a NFS CG La Wis Wis just out side the park in the NF. Sites were bigger and much less crowded. There is a nice aqua marine river running through the CG. A short hike up the river are some nice deep pools that my GS and I snorkeled in, lots of white fish on the bottom. For Olympic NP is was the same thing we ended up staying at South Beach an overflow CG right on the ocean. It was nice saw whales, orcas and even a large white shark chasing a baby whale. Don't miss Cape Flattery while in Olympic, it had to be one of the prettiest places that we have been to. Stayed at Mora CG which had a lot of sites available and was a short drive to Cape Flattery. My experience is the NFS CG's are larger usually more secluded and easier to get into than the NP CG's.
