summer baby vacation

Audrey • Baby #1 due early November x
Hi All, 
I'm from Australia, and am due 2nd November.
My husband and I go away every Christmas for a family vacation with other families and this year will be no different even with a newborn. 
I would love your thoughts on a few things. What should I be purchasing for the trip? It's interstate at the beach. Is there any suggested mosquito oils etc I can use on bub as she will be too young for the spray and sunscreen. What do I pack?! Thanks in advance x