Hi

My fiancee and I will be heading to AC on Oct 17 until Oct 25. When i travel, i hate bringing cash with me. I try to bring a minimal amount. I always pay by credit card or use ATM machine. But i am worried that in AC this may be a problem. I get conflicting reports that the ATM don't always work and not everyone accepts credit cards. Can someone who actually lives there tell me if international (Canada) cards will work at the ATM.
As well for people that have been there, how much loose cash should i bring (assuming we will probably do 3 or 4 activities while there)?
Thanks