that's all been figured out here already 
If i can get the system to log somewhere between 12 - 14 hours of data that is fine as i can renew the batteries each night if needed, i don't need a high log rate as i'm tracking when walking or in a canoe, neither of which move very fast ;D
It's basically a known working kit, i just want to remove the un-needed components and reduce the size of the whole thing as It's going to end up as a dedicated battery powered gps logger. I'm going to buy a uno to program the chip and then swap it over.
I would eventually like to add the gps logger onto the same board as everything else but we'll see how the soldering goes on the other parts first.