All you need in your Florida backpack is a change of underwear a lightweight wrinkle free tee, and a pair of capris. It's still very warm in October. Pack a portable $1.00 poncho in case of rain (they are REALLY teeny). For me I would need 1 mascara, 1 eyeliner, and a Burt's bees lip gloss, and be done. Wear a lightweight sweater you can tie around your waist. Have an easy ball cap to wear if the need arises. (I never go anywhere without protecting my face). Dress your hubs just as simply.
Everything else can be shipped to Cali. You could sleep in nothing, or just your underwear. Hotels provide the shampoo, etc. So, your backpack would me minimal.
I would Uber everywhere. And when going and leaving MK, go via CR resort, it will save a TON of time. When going to AK get dropped off at Rainforest Cafe and use that entrance, faster, easier, lighter security lines. Also I believe your Uber can drop you right there more easily. Use the international entrance to Epcot, no advice for HS.
I don't know if you have time but you also could apply for TSA pre check. Saves enormous amounts of time at the airport.
If not, the fact that you're not checking luggage and just each have a backpack should also save time.
I added this post, I've heard wonderful things about his transportation to and from the airport, he's less than Uber, were planning on using him in February.
Here's the link:
https://m.facebook.com/groups/844484195721563?view=permalink&id=1006355122867802
When you check with Bill Murphy, he may be willing to do ALL your driving for you if he's not booked. This would not only be cheaper, but faster.
Have fun!!!