Bags and Walt Disney World

Ok I have a two weeks and two days until My DH and 3 DD leave for WDW. Working out packing details in my head.

Take my JJB BRB (in GG)

But need some smaller bags

Want some thing with a small to carry my #2 DD emergency meds (epi pen), Disney Magic to the World card, credit card,money, Lip gloss, and cell phone in for on the rides.

I was thinking of getting a JJB Be Set

For the large one put it on the stroller to for my Kozy Mei Tei
Med to keep with me on the rides
Small as a wallet in the med

Will this work or are there other bags out there I can use better?

The Be Light might work too. And you can probably play around with the straps enough to secure it completely and fit everything you need.
If you wanna go a step further, the Mia Bossi Tobey might be great too