Congratulations on the new human hatchling!
As for parking the snake, what about putting a snake parking plant in the baby's room and thoroughly toddler-proofing it in advance? In other words, nothing a toddler or boa could knock over, get pinched by, stuck in, etc. I'm assuming you're snake is big enough not to be able to disappear down a teeny hole. So if you bring him into the baby's room and close the door, you should be able to just plop him down on the plant or wherever and he shouldn't be able to get into too much trouble while you tend to the baby.
If there's anything in the room he could hurt himself on, you'll have to do something about it eventually because a toddler could presumably also get hurt on it and babies tend to turn into toddlers. 😃