I agree with the other posters. If you are with two other couples, then it should be easy for the driver to stop along the way for you to withdraw money from an ATM. I usually get some yen at the airport and then along.

I am definitely with the gyoza and beer for every meal. I even was having gyoza and beer for breakfast in Nikko. The waitresses at the spot across from the expensive hotel we were staying at loved us. They'd just start bringing gyoza as soon as they saw us come in the door.