As far as the cams go...at about 4 weeks (provided PC coverage began within just a few days of removal from the molds) they should be softened sufficiently to be considered ripe. At that point is when I move them to the fridge. In the colder fridge they will last longer as that slows down the development severely. If you move them too early they will take much longer to ripen, if at all.
As far as blues go...I have much less experience with those, but if you want mold to grow, it will grow better in a 50-55F range than at 37F. I usually age them in my cave the proscribed time (which is about 6 weeks for the stiltons I have made).
For the blues, as I said, I have much less experience and only one real success, so I am more reluctant to offer advice there...You should check out the various makes and recipes available in the forum for advice and guidance there.