My sons outgrowing his binet in our room. Need advice on the transition to his crib!?

Well last week my son got way too big for his binet. So I brought the pack and play crib in our room.....I want him in our room until he is at least 6-7 months. then I will transition him into his crib.....at first he didn't like the pack and play because it was so much bigger than the binet, although he took to it okay. It took 3-4 days.....it was rough but hey when is anything easy with a newborn. Take care and good luck momma bear.