My wife is doing the EXACT same thing! She has about ten more to knock off the list in the next two years. The only thing I can offer is for him to do Alaska on Sept 10 to 20 range, specifically Denali! The grizzlies will be out putting on weight by eating the berries. Everything comes alive that week, such as Caribou, huge moose, fox, and more. I shot a documentary during those days and it was perfect!
That's EXACTLY when the Lovely Mrs ETS and I will be on site! Very glad to receive this good news! Although I enjoy wild berries myself, so there may be some fist-a-paws...