In your position, I would expand your focus to consider a diesel generator over a gas generator OR, perhaps a propane generator. Not trying to complicate your decision process. Only to enrich it!
It sounds to me, upon buzzing your post, that you are (only) very lightly considering this thing, being inconvenienced due to current circumstances.
Gas storage is not that pleasant. If power is really out, far and wide where you are, then gas pumps will be out as well.
I myself have little or no experience with home generators, but after having read many discussions by people who do and who have thrashed out the pros and cons at irritating length, most seem to elect diesels.
See if you can get to this discussion
http://tickerforum.org/akcs-www?post=197079
Gasoline generators are ok for when you already know the power is going to be out, such as an approaching hurricane or if you have a hunting camp to power for a few days. It can also be good for short term outages when you know you have enough incidental gasoline on hand to run a generator for 1 or 2 nights.
When it comes to long term unexpected outages such as ice storms or earthquakes, it is best to consider only diesel or propane. Natural gas is also an option, but less so for earthquake events. Personally, I would feel better having my own fuel on site, but there is always the possibility of someone pirating your propane or diesel. It is wise to put some thought into securing your generator and fuel during a major long term outage (>1 week). The sound of a running generator can attract unwanted attention from a long way off.