How many memory cards?

[Bigvin]

Hi

I'm off to New York in a few weeks for 11 nights.
How many memory cards do you think I'll need?
I currently have 4 x 8gb and a single 4gb.
I've seen the thread about the back up devices, but can't warrant spending £200+ for something that'll only be used once.

Cheers

 

[Alastair]

Less spray and pray, more focus and compose.. .. you should be fine