No matter what, either purchase a transfer switch or have a qualified electrician do your wiring to foolproof it so that there is no way to backfeed thru the meter and out onto the overhead lines. Just as the overhead lines have 7200 volts into the transformer and 120/240 volts to your house, when your generator backfeeds thru the transformer you have now just put 7200 volts onto the overhead line and ELECTROCUTED one or more lineman trying to restore power to everyone in your neighborhood! Or worse yet a family member like happened just a couple monthes ago. The son hooked up the generator while the father was working clearing the downed trees and happened to contact the overhead cable and was killed.
Always look at powering only the necessities. Just because it is nice to have AC or Hot water, you never know when your power is going to be restored, so never use more fuel than is absolutely required, and more power consumption translates directly into more fuel consumption!
Our preference around here is diesel. Doesn't hardly ever go bad, lot more readily availible, and when the bulkpumps can't fill a truck or cylinder, you can always use a siphon out of a 55 gallon drum! My 2 cents worth. Sorry so long.
"When in doubt shoot again"