For what it's worth, here are my suggestions.
Strongly consider buying a large t-bag. The expandable one. Pack it unexpanded, dirty clothes take up more space than clean ones, you'll need the extra space on the way back.
I would ditch:
tire repair kit/compressor...get the HOG Roadside assistance. Great value for $20.
the quart of oil. You can always buy one along the way if you need it. You probably won't
Octane boost. The gas along the way will be fine. You aren't going to the 3rd World, just Wyoming.
Tools. Nothing is gonna' break. If it does, use your HOG Roadside assistance.
Electrical tape. See above.
I would add:
electric jacket liners for you both. Or long underwear. I live in Boulder. It was in the 50s and rainy today. Snow above 11,000'
A large trash bag to separate clean/dirty clothes
More warm clothes.
Don't forget:
Maps
Cell phone/charger
Turn the battery "upside down" in your spare key. It will save the battery and you can leave it in your saddle bags and still lock your bike
Camera
"ICE" (in case of emergency) numbers entered into your cell phone.
Next time, I predict you'll have added:
GPS
Lowers
Beautiful country, but beware the weather. You could see 50+ degree temperature swings in a single day.