Camp and effeminate aren't exclusively the same thing. Camp is behaving in a theatrically over the top manner, mainly for a reaction. Effeminate, is, well, being feminine obviously.

Your definition of camp seems to be anything that isn't caveman-style masculine.

As for "you wouldn't be able to tell that he was gay right away?", there are plenty of both camp and effeminate straight guys. You'd just assume they're gay too? Likewise, do you assume all non-effeminate guys are straight?

As for Dan BB14, he has a slight effeminate way about him, but I certainly wouldn't call him camp, and his femininity is no moreso than plenty of straight guys. So, no, I wouldn't say he's a stereotype, certainly not to the levels that BB usually casts.