we camped a couple times in the dispersed camping area just below the marked Castle Lake campground. literally the best view of Mt Shasta ever. the roads to the campsites can get a bit narrow, so bringing in a trailer is a challenge, but we managed it ;)
relaxed atmosphere and reasonably priced for car and tent camping, plus camping fees include access to the rejuvenating sulphur-rich hot spring pool, swimming pool and sauna. this is right in the Ashland/Medford metro area so is very convenient for travel days when you have things to do in town. also hosts interesting events like yoga classes and live music!