You will love your Owners Locker!!
We just got one on our Jan. trip and I shipped a big box down with stuff for our locker. It cost me about $15 to ship it UPS ground with tracking.
I can't tell you how much I love that locker! So much so that I am adding a second one!

I will be able to travel with carryons only!
I have everything in my locker like a nice cozy fleece blanket, flip flops and bathing suits and more. Basically what I plan to do is have one OL for my toiletries, pins, toys for the kids, shoes like
Crocs and flip flops and then one OL for blankets, sheets, bathing suits, pj's, underware, etc....
The OL are pretty big but we really had to force ours shut when we left!LOL
Here is a list of the things I fit in one locker:
Ziplock bags
Underware
Tweezer
Tote Bag
Toothpaste
Tooth Paste(kids)
Tooth Brushes
Tissues
Swim Vest
Sunscreen
Straws
Soap
Shaving Cream
Shampoo
Sewing Kit
DH PJ's
Razors
Queen Fitted Sheet
Qtips
Powder
Pop Up Hamper
Pepto
My PJ's
My Clothing(3 prs of shorts)
Nail Clipper
Mouthwash
Lysol
Lint Brush
Lemonade On the Go Packs
Kids Activities
Hand Cream
Hair Spray
Hair Gel
Hair Brush
Glow Bracelets
Flushable Wipes
Floss
Flip Flops
Fleece Blanket
First Aid
Fabreeze
Dryer Sheets
Detergent
Deodorant
Crocs
Credit Card Holder
Conditioner
Comb
Childrens Tylonol
Cell Phone Charger
Batteries
Bathing Suits
Antibacterial Wipes
Advil