Amen on the temp changes, I have seen it in the high 30's at night and 55 during the day. I have been there when it was 70's at night and 90's during the day. Where we stay we can be back down to Lake Onterio and the 1000 Islands in about an hour. We fish Dog Lake for the largemouth in the weeds and then Loughborough Lake or 1000 Islands for the Smallmouth.
There is a really nice lodge on Loughborough Lake, where all you have to do is get there and they do the rest.