When to schedule Away rotations and Sub Is (confused)

So we apply start of Sept.
A couple of questions.

I have Sept and Oct to do a Sub I and an away rotation based on my 4th year schedule. I'm not sure which order to do it in.

1) Is doing a month long Sub I in medicine in October going to interfere with interviews? Does doing an away in September even make sense?

2) Or should I just do my Sub I in medicine in September and forget about an away rotation? Wouldn't October be too late for an away?

3) Will a letter from my Sub I even matter if I'm doing it this late?


Thanks