The family and I are going to the Wizarding World of Harry Potter in 2 weeks on an airline that charges for every type of baggage other than one personal item per person. I'm considering trying to get everything we need for 4 days packed into a medium sized bag each. The dimensions allowed are around 18x8x14.

We fly out on Friday at 2:30 and land around 6:30pm, so the first day we won't be doing much walking or site seeing, just getting settled in. We're renting a car, so we can pick up toiletries if we need to. Coming back we leave around 7 and land at around 9pm, so that will be a pretty full park day.

Here's my list of what I'm thinking of taking:

Wear on the plane:
1 Black cigarette pants (brand: nydj, and the most comfortable pants I've ever owned.)
2 knit tank
3 lightweight cashmere cardi (blush)
4 sandals
5 scarf (pale gray w/ gold speckle)
6 knit blazer (charcoal)

In the bag I plan to pack:
7 EF lantern dress in graphite (a very dark green)
8 light sleeveless rayon dress (black)
9 3/4 sleeve striped t shirt
10&11 layer tanks (2) also for sleepwear
12&13 leggings (2) layering and sleepwear
14 button up sleeveless blouse
15 sandals (a second pair of more gear like sandals)

Outfits options (in addition to the travel day) will be:
-pants w/ striped t
-EF dress w/ cardigan (w/ or w/o leggings for warmth)
-black dress w/ knit jacket
-black dress layered over striped t
-button up blouse w/ pants and knit jacket

The weather looks like it will be mid 60's to low 70's for the highs, and into the low 50's for lows. So far I'm not planning on taking a rain jacket, but we will pack a few cheap ponchos. I've been thinking of picking up a packable rain jacket like the one below.

The cardigan can be layered under the knit jacket on cooler nights. Both dresses work with mid calf length leggings. If I get extra cold I'm planning to go full on tourist and wear socks w/ my tevas. I learned while camping that socks and tevas is literally foot nirvana, and my happy feet erase all sense of fashion from my brain.

Should we just pay for one giant suitcase for all of us? It's really more about the challenge than the cost. If I brought a suitcase I'd add in a pair of cut off jean shorts and my rain trench (in finds) and I'd have more room for souvenirs in my personal item. Over to you. Am I just nuts?