John M.-
A creeper is a necessity if you want to put a snowthrower on a gear drive, unless all you get is extremely light snow an inch at a time. First gear is too fast for most snows, and I disagree with the suggestion to slip the clutch to slow it down. Won't be long and the pressure plates will be glazed, and then it'll slip very easily. Throttle needs to be wide open to throw snow; don't even think about trying to modulate your speed with the throttle, either.
Years ago (sadly I think I'm old enough to say that now...I think this was 9-10 years ago) I put a snowthrower on a 128 I had at the time. That was the first and last time I've used one on a gear drive. I had a hard time finding the right speed, and I got tired of shifting the creeper from low to high every time I wanted to use reverse and back again. For the thrower to really work properly, you have to vary the tractor's forward speed to keep the thrower full, but not too full. Without a hydro, this is about impossible in my experience.