[hobbit]

Hey folks.
I'm going to be heading down to kosziosko in a couple of weeks and want to try some nightscapes with the 6x17. Unfortunately the fastest film i can get is 400.
Now I can stick it on a skytracker and do a longer exposure but reciprocity failure will kick in pretty quickly or I can get the lab to push the film a bit or a combination of the two.
Can anyone recommend the best way to go about this?

Cheers