Thanks for the answers. Buying casascius coins sounds like a nice idea, but I don't have a lot of cash to invest in that kind of thing. I'll talk to the festival organizers about it though, cheers for the idea.

I forgot to mention: the festival is in Europe, in Romania to be more precise. SMS would do the job. I have found only one SMS-to-Bitcoin wallet application that would work here, on the http://blockchain.info/ site. I'll look into how safe it is.

I'm assuming some people will have Android phones, in that case wouldn't it be a good idea to also print a QR code off this site http://qr.ma.eatgold.com/index.php and use that?

Hi all,

I'm planning a stall for one of those festivals swarming with free spirits. Should they have bitcoins, we want to accept them.

So the issue is, what's the easiest way to conduct bitcoin transactions somewhere in the woods, where internet connectivity is not necessarily a given?