Our trip isn't until Aug 27,but I usually start making all the packing lists right after I book, then I make up a list of "to buys"and take a day and go get these items or add a few to my weekly shopping list . Then I put them in the closet and there they stay until the week before and then I pack( usually if the kids( 5&7)are occupied with something else) otherwise I would have everything We don't need as well as a few suprisesthat they snuck in!