This is our first trip coming up as well but we have found in general these things are very important when traveling away from home-
Oh! & This only works really well if you are driving...
Don't forget your "everyday must haves"
>i.e. if you are a Pepsi product person- buy your sodas and load them in the vehicle- no telling how much they will be in the WDW area let alone- not getting Pepsi products at WDW at all...

>When will "Aunt Flo" be visiting... Plan accordingly- enough said...
>Toiletries... if you have particulars or really will need a certain something- Bring it! (lotions, meds, razers, hair supplies, etc)
>glasses, sunglasses, back up pair... contact, solution, etc
>toothbrushes and such... we pack last since we use them before leaving and they have been left more often than not- Too expensive if you can't get to a local "regular" store
>water- water bottles, holder or carabiner clip-, capri-sonnes, package drinks of sorts... much cheaper to buy and bring with ya
>if you want beer, cigs, etc- bring your own from your local stores unless you KNOW it will be cheaper at the "House of the Mouse"- (usually not)
>stamps- gotta send yourself a postcard from WDW and maybe a few more to the fam that didn't get to come...
>sunscreen, bugspray, etc
>batteries, chargers, etc for any and all electronics
>extra SD cards and battery pack or whatever format you will need for camera
>extra change (preferrably quarters and shiny pennies for the pressed penny machines
>extra shoes- just in case one pair gets wet, or tears, etc- much less expensive and better on feet to have that already comfy pair with you
Many other things that would normally be "planned" for- The above items are just things we have noticed we somehow always used to forget about and need -
Also good to have- a couple trash bags, band aids & neosporin, aspirin, and all kids over 10 having their own bag to carry in the parks helps too- They don't have to carry it but it is their choice and if something they specifically want gets left, they had a choice...