Questions about members app

Hi, just a couple of quick questions about the members app.

I'm thinking of using this to protect some content that will form part of an interactive demo at a conference.

There will be four or six iPads logging into the demo.

My question is, what's the default login timeout time, and can it be set to a couple of hours so we're not having to keep logging back in everything now and then.

Would you be able to log on to the content simultaneously on multiple devices with the same account or would it be better to create an account for each demo unit.

Thanks in advance :)