Oh man, I have so many "must haves"!!!
a fan for noise
laundry tablets and quarters
kitchen trash bags for dirty laundry
fanny pack
an extra phone cord for my laptop
plenty of batteries for walkie talkies and pal mickey
chargers for our cell phones and digital camera
phone number list, including local AOL #'s for dialup
ziploc bags, sandwich size and freezer size, good for all kinds of things
quarters and pennies for pressed penney machines
expensive light-up toys for nights at the park (so we don't have to buy new ones for every trip!)

my lime green ribbon!
extra duffle bag for "unexpected" purchases
mickey ponchos!!!! (don't want to buy those every trip either)

first aid kit
sewing kit, safety pins
cold medicines for us and the kids (someone is always bound to get sick)
other assorted medicines for all kinds of problems
Boy, I could go on and on........