It's all about the tank bag when paying tolls with cash. Well, really it's about planning and a tank bag. Keep the cash/coins in their own accessible pocket with nothing else in it. When I have to pay a toll that I wasn't expecting I pull over before I get to the booth, sort out the money THEN ride up to the booth. People have places to be -- I would hate to get off my bike to dig around in my pockets with people behind me.
Also, consider
this system. I often keep toll money in there.
When wearing thick gloves at least one will have to come off unless you really plan each toll and have the money counted out, separated and very easy to get to.
If you can't get to the cash and it's an automated booth (no gate) just roll through. BUT! You must flip off the camera when using this method. You get ZERO points without the bird. I can't stress this enough.