How do I pack for a trip?

I am about to take a trip along the East Coast.  It's kind of a fly by the seat of my pants trip.  By that I mean nothing is really planned in stone.  I have spots I want to hit, for sure.  However, time will limit how many of those I get to see.

I am going mainly to be shooting landscapes and wildlife, but I really have no other idea what I might run into along the journey.  For that reason I have packed a little heavier than normal.

Above is a picture of my main camera bag.  The other bag is mainly holding batteries, a GoPro and accessories for that GoPro.  You can click on the image to see it larger.