I'd probably want to drop the bowl off the carb and get any crud from evaporated gas before you run it and try to shove it through the jets. And, give them a blast from the carb cleaner can, maybe even pull them out and look/ clean.

Probably wouldn't sweat the wheel bearings, but you know exactly what weather it was subjected to. I'd certainly drain the tank and shine a light. See anything that troubles you, pull it, add some gas, slosh it, drop the petcock, drain and inspect the results. Old oil, even if it only has a few hundred miles on it, can become acidic from the stuff the blowby put in it.
And don't pull the plug without a reason or before cleaning out down where it sits.

Mmmkkay, then fire it up, ride, stay close to home, listen  to it, see if the bearing loosens up.
Not much you can do with the bearing. Unless you fabricate a way to put a hypodermic needle on a grease gun. I've seen it done. Not sure if both sides are sealed.

Hafta knock them out, hold them, spin, feel. If one actually spins freely, it's not okay. A good bearing doesn't just spin. It's Smooooth, no crunching, but it doesn't just keep spinning after you give it a flick. Comes to a halt pretty quick..
And, if you decide to replace any, take one to the industrial bearing supply, not the dealership or auto parts store.