"Clutch Hand"? What are you riding over there in New York?
You are brave for riding there in winter.
I have ridden in the twenties and it is doable with big gloves. Your control is compromised with the big gloves, but they are necessary.
I have tried grip warmers and they heat my palm well, but do nothing for the real problem of frozen finger tips. I was tempted to add motocross style grip guards to block the wind.
Keeping your hands warm and helmet shield clear are the biggest problems that I have found to cold weather riding.
I use a Hyper Optics shield insert, which has been the most effective at controlling fogging. I also have an insert at the helmet chin to block upward air.
A full face helmet is a must.
Black ice is a bitch back there, so be careful.