Diesel is exceedingly viable so long as you understand the risks. Transport is definitely one of those risks which can be alleviated by a larger storage tank.
Do note that the transfer pumps which move the diesel from the large tanks to the closer small tanks should be on generator power and not on utility power. Obvious now yes but this was mentioned a while back in comp.risks.
Not in earthquake country.
You'd also be surprised, or not, just how many gas stations and bulk fuel dealers don't have generators. None that I know of. Maybe Florida is in better shape as I heard the governor there decided to put in a law along those lines given the number of hurricanes which take out power for a while.
Note that the bulk fuel dealers have a lot of anti siphoning devices to combat thieves. And likely legal liability issues if those thieves manage to burn themselves up. So you pretty much have to go through the pumps.
Tony