Convenient and cleaner than usual
I've camped at Summit Meadows Airstrip before and came across a lot of trash and sites in gross condition. This is a bit of a free-for-all dispersed campground, but it provides great access to Mt. Hood and Trillium Lake. There are sites of every size and the airstrip is usually occupied by at least a few people. Lots of nice trees for hammocking too.
During this most recent stay, it wasn't too busy so we had plenty of sites to choose from. It also seemed to be cleaner than last time... maybe because it's the beginning of the summer season? Everyone was friendly and respectful and we got a great sunset view of Mt. Hood by walking just down the road. Great view of the stars at night too!
Overall this isn't the most hygienic site, but it's well established and free so I've stayed here several times and will probably continue to do so in the future.