Hmm ...

Term ends on October 15.

This means I have a weeklong break beginning the 15th and ending on the 25th, or even later (my schedule next term is really messed up; two term projects and only one class, which begins on the 28th).

Therefore, weekend 16-17 or 23-24 are looking the best.

I'd need to know three weeks in advance if I want to get it off work.

Any date earlier than those aforementioned and it is guaranteed I won't be able to come.