Just got back from 2000 mile 8 day scooter Trip, went to 8 or 9 states, half back roads, rest freeway. No bike troubles.
Temps: 30 to 60 degrees F, so cold feeling, rained only at nite
Even though I have been doing this since 1955 and high miles....still make mistakes in clothes selection-----and get cold as result----Aerostich Darien Jack 3/4 jacket and Pants ok---I did not take purchased up north feather jacket as liner, instead feather vest and feather shirt (purchased in south and they are just not warm)...so got cold a couple of times=my fault.
Made choice of wrong helmet for all day comfort---Vega 3/4, 3 lbs with face shield usually I wear 2 lbs GMAX 3/4 with long snap on bill so riding into sun no strain.
Windshield stock Kymco with Laminar Lip bolted on---probably too narrow for serious winter use---I have Puig Touring screen which I put back on yesterday!.
Givi E-46 box with hole for dog's head. Took off and replaced with much lighter Bestem (and smaller) box.I find heavy/big box and 2 Ortlieb rubber bags (all up high) raise CG too much and bike can be handful in strong crosswinds.
Bike is my new SilverWing replacement, Kymco 2019 XTown 300i ABS, much lighter than SilverWing and works well for old fart (will be 80 in May.) On road performance fine, 60-70 mpg, price great, 2 yr warranty.
Aerostich Kombat Lite boots worked great for temps involved. Carry rubber over boots for wet. Langlitz gloves for cold, Aero elkskin ropers for warmer temps.
Only bikes you see on the roads are Harleys---saw no scooters, not even 50cc like you see a lot of in Canada.
Motel 6 in US going to pot----all seem to be India owned/managed...and they are not great Inn Keepers.
End: I think people with bikes/scooters should be riding---did see lots of trailer bikers(Wimps). My costs run about total of $100 a day plus wear on scooter