You want some cash but probably not too much cash. After all, if someone tonks you on the head and runs off with it you won't have it anymore. No matter how supportive your bank is you still might not have any cash for a few days yet.

On the other hand, if you're going somewhere not well known for its ATM density then you have a slightly different problem. You may well have to take quite a lot of cash into the country.

Another problem is that the likelihood of hotels and petrol stations taking cards might be extremely limited. You might burn up all your cash on fuel.

Hmm, tricky. There are no particular answers other than being as ready as you can be.