I wouldn't get too anal retentive on weatherization...get it on it's center stand, lube the chain, change the oil (so it'll be ready to ride in the spring)and run the engine to operating temp, top off the tank and add fuel stabilizer, then shut it down and either pull the battery (my recommendation in a below zero climate, I bring mine inside) OR trickle charge it..
If an RE can't survive using these simple methods then we are ALL in trouble..