My suggestions: Non ethanol 87 gas, I would drain the tank and put fresh in. Relocate the gas tank vent, it is known to cause water in the tank. Replace the spark plugs, mostly insurance but if you foul one good they tend to not run 100% no matter what you do to clean them. You do not have to remove the air box to change plugs (not hard to) but do need a couple 3" extensions and a magnet to get them out, pretty sure the plug is a 14mm. 0W-30 oil. You have to have a pretty hot battery for these things to crank. I would leave it on a battery tender or even better get a battery heater or tender and block heater for those - temps.
ethonal free gas does not have the winter additives the gas pump stuff does, maybe good for warm area for its storage benefits but is need to make a vehicle run properly in the north. the cars and trucks run fine forever in neg temps. the only disadvantage is you have to use stabil if you dont plan on using the gas in less than a couple weeks because of the ethonal. honda must push the 100 because the lady said it had it in the tank from the factory and that was what they recommend you keep in it, but you will have problems if you do in the cold