The gumdrop minis are absolutely adorable! I've got all of them and love them. Cutest minis in ages.
They're good fillers for spaces in trees/wreaths, can be attached to stockings as charms with a needle and thread, can have their own mini tree, some people turn them into earrings or other jewelry, lots of possibilities.
If it helps, I've heard the "proper" way to decorate a tree is to put the biggest ornaments on the bottom and smallest on the top. For your food tree, try putting just minis on the top branches. Apparently, it gives the illusion of a taller tree, that's why it's the "proper" thing to do.
I love the Yuletide Rider too since I have a soft spot for stick horses. I'm probably going to watch it and see how well it does or doesn't do before I buy it. If it doesn't sell well, I'll wait until after Christmas.