We spent the night at Elk Lake Campground. Highly recommend it if you can get a reservation. We were in spot 11 which had great views at sunset.
From Bend take Cascade Lakes Highway to the Lucky Lake Trailhead. Fill out the free day use permit here (and put your Northwest Forest pass in your car window), then head up the trail. It's an easy 1.3 miles to Lucky Lake. There was some blowdowns a cross the trail as it's early season and they haven't been chopped yet.
At Lucky Lake we turned north and followed the trail Senoj Lake Trail. Below the saddle on Williamson Mountain is a nice open slope. We headed up this and gained the saddle. From here follow the ridgeline to the AZ and the summit. We operated from a nice little spot in the AZ with good views of the Sisters and Mt Bachelor. We didn't go all the way to the summit as it was pretty hot and this was a nice spot to operate.
I set up my KX2 and EFRW and got to work. Cell service was intermittant so I relied mostly on RBN to spot me. I had a good run across 40,30, and 20 meters. It was pretty hot on the summit, so I didn't bother calling on 2m. We made our way down mostly the way we came up and spent some time cooling off at the lake.
I'm not sure why this summit only has 3 activations. I think it's a must do for anyone camping in the area.
