Hm, dont know too much about this, but remember, traffic is going to be delivered by search engines to your upcoming blog. And as you rightly said, unless you have some unique content(text), it would be hard to "compete" with the established ones.
Maybe you could post the pictures and your take on what is unique to the location/picture/car?
Or, if this is just going to be a hobby, why bother about "success", just keep posting the pictures!
Ps. Why not share a few with us?