We are traveling w/extended family (12 of us in all...5 kids) and I am definately going to check out the cereal cups/bowls at Target!
Extras we bring:
nightlight
flashlight (campground movie/marshmallow roast)
hand soap
dish soap (sample size for sippy cups)
bottled water
mini juice boxes
pb & j (plastic jars)
crackers
my homemade 1st aid kit (which includes personal emergency items)
trial size hand sanitizer
disposable toilet seat covers (dd is 3yrs)
trial size laundry detergent (should we need to do laundry

while on vacation)
travel hair dryer
dental floss (can't live without it!!)
ribbon (for the rental stroller)
pull ups for nighttime sleeping (if we still need them by Oct)
We are packing lightly on clothing and I DO plan to launder anything that is heavily soiled or that we definately need to wear again. DD3 is easy, she would LIVE in her swimsuit if I let her!
DH and I are only bringing 2 pr. shoes each...shouldn't need more than that (one comfortable and one a little more...ie boat shoes for dh

)
Did I miss anything HUGELY important when traveling w/daughter?