Covid and visiting in-laws

My in-laws are flying from North Carolina (significant covid area) through two airports to visit us in a couple of weeks. I am so nervous about them bringing covid to us. What precautions if any would you take? I know they will want to love of our son and I want them to be able to but I don’t want them to get him or us sick. My parents live in town and are a part of our “bubble” so they get to hug and snuggle him. MIL was giving me a hard time about not coming to visit them and I said we would come when it was safe to travel and she seemed surprised so I am not sure how serious they are taking the pandemic. I just feel so conflicted and nervous. Help! Thanks!