How I fit my Hood to Coast gear into one bag

Here's what I'm packing for the Hood to Coast relay this weekend. I mentioned before that it's a new challenge for me to pack for a relay race that I am flying to. I used this post from Oiselle that a teammate found to help make sure I didn't leave anything out. It also gave me the brilliant idea of packing each leg outfit into a separate ziploc bag. Relay level: expert. Here's what I came up with. 

In my bag:

• Three running outfits, including sports bras, top, shorts, socks.
• One pair of running shoes.
• Extra layers: one thin jacket/stretchy pants and one fleece pullover/sweatpants.
• Blanket and pillow. My blanket has bumblebees on it, just so you know.
• Extra running socks.
• Compression socks.
• Arm warmers. These are awesome for "inbetween" weather conditions. Also, they make me feel fast.
• Garmin.
• Chargers, adapter, cords, extra batteries.
• Reflective vest, red blinky light, extra blinky light, and headlamp.
• A few snackies for the road.
• Nuun for hydration. You add this to water.
• Empty handheld water bottle. I can fill this up wherever and add Nuun--helpful for airport security liquid restrictions and being green.
• Toiletries. Toothbrush/small toothpaste, deodorant, hairbrush, wet wipes; I'll just use hotel shampoo and soap.
• Small towel.
• Extra bag to account for any purchases, souvenirs, and/or midtrip stuff expansion.
• Clothes for post-race/next day. I'll wear some of these tomorrow as well to save space.

All that (sorta) fits into my bag! The pillow doesn't really count. Not bad for one carry-on. Winning. Note wistful fuzzy friend at bottom right. She does not fit into my bag and is very sad about it. Normally I would like to bring more--my The Stick, an extra pair of shoes, more dry clothes. At least the rain chances this weekend are pretty slim. Have a look at this enormously helpful Hood to Coast weather report. Besides my bag, I'll of course have a purse with my Kindle, phone, headphones, cards, cash, etc.

Buying upon arrival/share with others:

• Food
• Water
• Sunscreen
• Insect repellent
• Tarp?

The only thing that could improve this array is a Slanket, amirite?