In general, you can keep kings and corns in the same conditions. There are minor differences, dependent upon which species of kingsnake you are interested in, but the differences are such that keeping them identically to cornsnakes won't be a problem, with very few exceptions.
You aren't likely to find a forum that is as user-friendly, accessible, and lively as this one is, and especially not for kingsnakes in particular. This forum has General Chit-Chat, and that's as good as anything, in my opinion...