My mother in law wanted to bring my 16 month old son to family event out of town. Due to work issue, me and hubby can't attend the event. Is it safe to baby in that age travelling without parents? And what should i prepare to make my mom in law easier? They stay for 3 days.

In additional to what Diana mentioned, you can also try having your baby stay with your mother-in-law for a night to see if she could handle the baby? In a way, you wouldn't want her to be overwhelmed during her trip as well. Ultimately, it is dependent on how comfortable you are with the arrangement I guess.