So, the party went really well, and even though I forgot to put out a lot of the fairy snacks I made, I'm really happy with the outcome. The babies had lots of fun and really got into the crown making and fairy house painting. Around 18 babies and their parents were at the party, all crammed into our small backyard.
My sister ended up making "Fairy Stew" AKA vegan chili, summer salad, dino pb&j's for the babies, lots of organic fruit, fairy cupcakes with homemade frosting and sprinkles (verrrrrry little suger, but SO GOOD), and we had lemonade/limeade with raspberries to drink, along with water and ice tea.
The party went from 10am until 1, but ended up going until around 2 because we were having so much fun. Most of my non-parent friends didn't make it until later, because the concept of having a party at 10 in the morning was so strange (it won't be after they have kids and start working around the nap schedules!). All in all it was a lot of fun, and fairly low stress, a combination I am really not used to!