Raised Camellia Bed worked great!
I made small raised camellia beds next to the North wall of the house--on the shortest days of the year they get full sun but otherwise they are in shade. They did great this year--plenty of buds and blooms--even revived some plants that were planted in too much shade last year. We are quite a bit north of where camellias normally grow, so they don't seen to mind the full sun. I'll be expanding the small beds to make on really big bed--perhaps 20 long and 6 feet wide.
I was careful to get only the really cold hardy varieties from Camellia Forest nurseries.