First week of October concentrate on 2 things.......food sources and being scent free.

Seriously, I have not had a whole lot of success with scents early on but if you can pattern a good buck (or bachelor group still) heading to a food source everyday such as corn or beans etc it's not hard to intercept him while he's still feeling comfy from a summer of not being bothered too much. Get between where he wants to bed and where he wants to eat. Just don't force the wind issue and blow it.......they are pretty relaxed this time of year but won't tolerate much, especially a 2.5yr old or better. It takes a special kind of paranoid for a deer to make it to 3.5 in PA.

The first week is one of my favorites (Actually the 1st 3 days are REALLY my favorite)........they wise up and change their habits PDQ in this state when they start feeling some pressure.
I can't remember a really COLD 1st week of October, but I do remember quite a few very warm ones.......cool mornings, warm afternoons. Indian Summer always seems to drop in that week.