1st night back in crib---need LOTS of advice

My son is 9 months old. We have been having some sleep issues, because he has been sick, and we have been taking him into our bed. About 2 months ago, we did CIO, and then a couple of days later, he got a bad cough, and back into our bed.

So now tonight, we try again. But this is a whole new world. He is now crawling and walking (holding on) all around the crib. He actually feel asleep with his cheek rested on the railing, standing up (he was snoring, and when I walked in the room, he didnt even flinch ).

I am just so nervous about him walking around, and standing up soooo tired. It took him about 40 minutes to finally fall asleep, then he woke up an hour later. Fell back asleep and is now up again, less than 30 minutes later. This time he is not standing up (yet), he is just sitting and crawling around. He is exhausted.

How do you ladies do it