Rita, every one of those crocus count!! My method for planting them in large groups is to scoop out a shallow area of the dirt, stick the bulbs in, and then gently cover them with the dirt I removed. It goes very fast that way. Of course, I've never planted hundreds of them, so your way is probably a lot faster!
I'm amazed at how tall crocus can grow to get to where they can bloom. I have some that are growing under some ground cover. They have to grow at least 12 inches or more to get through to the sun, and they do that every year without fail. Others only grow half that tall, at best, if there is nothing but some mulch to grow through. I sure do love them!
I'm going to dig up a bunch of muscari from the backyard to take with me to Idaho. It's been a real problem plant for me, and takes over quickly, but I'll plant it where it can grow wild, down the side of the hill. In a couple of years, that wild hillside should look amazing! I swore that I'd never have muscari in my yard again, since most of my weeding in the spring is to pull more of it up, but growing it where I won't have anything organized would be great. It's everywhere in my daylily beds!