I thought that they used to be Suntrust. Doesn't matter, we dropped Suntrust over issues (they neglected to move money for me causing me to bounce high dollar checks! ) and now use a local bank that I wouldn't even begin to know how to find one of their affiliates. I use my Visa check card for every thing. Hardly carry any cash at all.
I was actually really shocked when I was down there. I didn't want to carry cash on the plane with me so I used the ATM in Pop's lobby. It was only a $2.50 charge. I expcected it to be much larger than that. I don't know about you, but we get charged that to use the ATM at the mall.
They'll take credit cards most places. Not sure if they treat the credit cards the same way they do room keys however. If you have charging privileges on your room key (assuming you're staying at a WDW resort), then there are very, very fewplaces that won't accept the room key.