What to do with my Canadian bank account?

Hi everyone,

I'm graduating this semester and I'll be leaving after convocation ceremony in june. I was planning on emptying out my bank account (checking is CAD and savings is USD) by just using cash for everything. However, I heard that i can just keep the bank account and whenever I visit I can just use it. As an american citizen, would I be taxed? Has anyone else been in this situation?

Thanks