Chris I couldn't help but notice the bulk you had packed on your bike when you left. But I also know you like to camp in comfort. Was a camp chair included in your load??? What did you have with you that you didn't use? I guess that if you used everything then it was worth bringing.
There are always things you can leave behind - on purpose or otherwise. I have come to have the opposite problem. When I packed my bike to leave for Spearfish I had too much room in my dry bag so I took an extra pillow just to fill it up. I didn't need two pillows, but I'll admit it was kind of nice. I think I used everything I brought except my took kit and air pump (thankfully), and one pair of pants. (Yes, I did change underware every day so don't go there) My panniers weren't even full. However my tank bag is a real junkyard. Can't find anything in there cause that's where most everything is. It took me a few minutes to find my USB converter when I wanted it. Modern motorcycles should come with USB, SAE, Powerlet, and cig lighter sockets. And with Bluetooth, GPS, radar detectors, weather radar, weather alert, cruise control, ABS, traction control, stability control, heated grips and seat, anti-theft alarm, TPMS, driving lights, deer whistles, flashing brake light, self canceling turn signals, adjustable suspension (from the seat), go pro, spot locater, HDMI, back-up camera, and climate control. Hummmm, mabye that is a little excessive, but I can see how you got to 70#. Why do you think you have to reduce your load?
I think my camping gear and clothes weigh about half of your 70# (add about 100# if my "stitch" is wet), but the value of everything is far more than your $2,000. What did you count? Just my riding suit, helmet, boots, gloves, and electric vest come to equal your $2,000. But my camping gear, clothing, and dry bags only come to about $600 to $700.