Thank you for the information. I think Dean is correct. Many years ago we went to England and brought travelers checks in pounds, and had a very hard time cashing them other than the banks. So travelers checks are not the way to go anymore.
With respect to cashing in dollars for pounds prior to leaving the states, in my experience, you get a lousy exchange rate. I may do that just to have a $100 worth of pounds in my pocket when we land in England, but beyond that, I don't think that is the way to go.
My husband works with someone from England and when they go back to visit they usually bring US dollars and change them in the banks there for little or no fees.
I will look into the CU option for an ATM card.
By the way, we are flying into London and renting a car for 4 nights to drive to York and possible the Lake District and then using our
DVC points to trade for an apartment in London for a week and then we need to find a hotel for 2 more nights.
If anyone has any suggestions for sights or reasonably priced hotels in York or London, let me know. Please keep in mind that I am bringing a 9 year old and 5 1/2 year old, if you have any suggestions. We will be going in mid August, if that helps with suggestions.
Thanks for all your help. I knew I could count on disboards!