You will get a lot of ideas here of things to pack in your OL, not to mention if you search this forum for other similar threads. Let me just add that I think there's still a discount on the initial fee for
DVC owners - there used to be a link on the member website, but if not you can message the OL folks via their website. They are DVC owners themselves and wonderful to work with!
Once you sign up, you'll have access to your Dashboard, where there's a place for you to keep a list of items that you store in your OL. We kept full size containers of shampoo, lotion, toothpaste, etc. in there, not to mention OTC meds that expire, so at the end of every stay when we were packing up (I hope you're good at Tetris) I could make notes on that online list of items that needed to be replaced or replenished. The list automatically alphabetizes, so I started the name of each item with a B for Bathroom items, K for kitchen, etc. One tip that I didn't find out about until we were about to give ours up is that if you put a . as the first character, those items will move to the top of the list. (I know that's probably ho-hum knowledge to you younger folks who have been dealing with computers since you were small, but when I was in college the mainframe computer took up a huge building, so....)