We leave a LOT of stuff - things that make packing easier, things that make our time at Disney more comfortable. I realized on our last trip that if we didn't mind wearing the same 3 outfits all the time, and assuming I have my purse as I normally have it (I always have at least my wallet, iPhone, laptop or iPad, PNS camera, small makeup bag) and DH has his wallet, we could leave for Disney with just that and our SunPass transponder and not pack a suitcase
at all. One day I might just try that! I have a long inventory of items for our 3 Lockers, but some of the items I'll point out are:
Brita pitcher, filters and water bottles - no buying bottled water anymore and no tap water taste (none of us like the taste of the local water)
Toiletries - I can't say enough about how great it is to not have to pack this stuff. We can fly carry-on if we wish. No making sure I have trial sizes, no refilling little bottles, much less waste (no multiple tiny plastic bottles of stuff). Plus I have more stuff than I might normally pack. If I were packing toiletries I might make do with whatever lotion they have in the room, but with my Locker I have the exact stuff I like.
Ponchos and mist fans - no more having to ferry these back and forth - no having to keep a Disney box at home.
Lighted/spinning Disney toys - because these are in Lockers, they don't feel "old" to DS so he's happy to use them again and again.
Coffee grinder, scoop and filters - another thing we don't have to remember to pack each time and this way DH could have coffee the way he likes it. I might bring the grinder home though because DH has given up coffee since our last visit! (no caffeine and he doesn't like decaf).
Scissors - By far the MOST USED item in our Lockers! I never realized how often we need them until I actually had them.
Battery charger, extra batteries, cell phone chargers, extra camera battery charger - No more running to Wal-Mart because someone forgot their charger, and if you've ever forgotten a camera battery charger, you know how much of a problem that can be.
A good kitchen knife - the knives in most
DVC units are horrible!
Cards, crayons, markers, activity books, Disney Scene It - for rainy afternoons and evenings spent in the room.
Fleece throw - I'm always the one freezing when everyone else is comfortable, so one visit I got the purchase-with-purchase fleece throw of the castle with the holiday lights. I also keep a sweatshirt in a Locker for the same reason, plus it really comes in handy for unexpected cool nights or rainy days on warmer weather trips where I might not have packed something heavy enough.
Over-the-door shoe organizer - Keeps the bathroom nice and neat
Bleach - I like to clean the whirlpool tub thoroughly
Laundry supplies - Purex sheets, some packets of liquid Tide, Bounce sheets
All sorts of OTC meds, bandaids, blister block, nail clippers, eyeglass repair kit, eyeglass cleaner, disposable contacts
Swimsuits, goggles and ear plugs - we still pack suits for the trip but this allows us to have a spare, so no one is putting on a still-damp suit. And DH has ear issues, so we're never without silicone ear plugs.
Small electric griddle - my son loves pancakes, what can I say?
Other kitchen tools - stuff that makes a difference for us - like an ice cream scoop, aluminum foil, Ziplocs, cooking spray, etc
pop-up hamper - keeps us neat and tidy
running shoes and gear - running shoes take up so much luggage space so having them there (and the clothes) means there's no reason for us to not keep up with our running on vacation.
liquor - if I want to make a fuzzy navel or DH wants a bit of scotch, we have it and no going out to a liquor store. Plus we'd never drink even close to a whole bottle on vacation, so no waste or trying to transport it.
Disney books/guides - Hidden Mickeys, Imagineers Guide books
hand warmers and fleece gloves - if you've ever gone in cold weather, these are great to have on hand (no pun intended)
extra clothes, Crocs, flip flops - if we check luggage and it's lost, we're covered. If we want to just pack lighter, we're covered. Plus I leave items I personally wouldn't wear anywhere but Disney.
scrapbook - we have a scrapbook where we write about each trip (including having DS write in it - he was 7 when we started) and I have photo corners so I can include a pictures I have printed through Photopass while we're there. I also made a shutterfly photo book last year with pictures from all our Disney trips and got a free extra copy, so that lives in a Locker - DS loves to look at it!
I could go on and on about what we have in our Lockers and how wonderful the service is!!! Could we pack and bring a lot of this stuff with us? Sure. But we probably wouldn't. But I can't tell you how much more homey and comfortable it makes our trips. And frankly, DH and I are both very busy and I'm the vacation organizer and primary packer. My time and energy are worth a lot to me and my family, so making the vacation packing and prep easier is well worth the cost of our Lockers.