IMO its important to be consistent with his bedtime routine more so then with the crib. Also he will most definitly test out his new freedom.. me persistent.. when he gets up, walk him back into his bed with out saying a word to him and eventually he'll pick up that you're not giving up on this. it'll probably start out a little rocky, but in a week or two if you stick to your routine he will most likely be going to bed just as easy as in his crib. (this advice is solely based on our experience, i am sure every child will react differently) GL!
Re: Transition from crib to big boy bed