I'm not sure how I missed the beginning of your adventure here in the US. You for sure covered some of the best of the US for sure. As for being able to cover everything to be marveled at, just is not going to happen. I've been roaming this country pretty heavy for the last 20 years by motorcycle and have not put a big dent in all the things I want to experience. I still plan on getting to a few places I have not been to yet but, sadly, it will probably be in my truck due to injuries and mainly, as getting older, less tolerant to the extremes of heat and cold.
Probably have the KLR on the back bumper though. ;-)
A '00 KLR 650 37,000 miles, A '07 1250S 75,000 actual, A '03 5.3L Chevy Truck 75,000 + '43 style dude , Simper Fi ;-)