Toni,
It is unlikely that the search engines are going to send traffic to a one page site, no matter how much you do for it.
So I would forget about the search engines, and focus on people.
Having said that, yes, I would put the Photo Hub Club content and info and sales page on that site, then just forward for the payment button –
it will seem more professional that way – and then if down the road you do want to start putting articles on there and playing the whole seo game, you can.
Sean