>> I've got about 600 bulbs coming for a semi-guerrilla gardening project. Based on last year, I'll get them around Halloween. <<

Whooee, you got me beat! :D

>>I was hoping to find a tool that would work better than my pitchfork for planting them in sod, but everything to sized for like big hybrid tulips and I'm planting little species bulbs that are much smaller. So pitchfork it is again!<<

Amazon has some things sized for planting smaller bulbs. Some are narrower tube types, and they have some dibble sticks too.

https://www.amazon.com/Best-Sellers-Bulb-Planters/zgbs/lawn-garden/3480681011