Besides, I doubt Bakersfield was a target of any greater interest - there is no military base in its vicinity, no secret compound (at least, not a one we've been shown, but that would hardly be an argument), no big civilian population - and as Wumbology points out, its buildings are largely intact.
What could have happened with Bakersfield, that prompted Raul to say something like that, is that it had been bombed by low-yield bombs which don't have a great impact force, but are very "dirty". If such an event occurred, it would explain the extreme radiation levels which turned all, or at least, most of its population to ghouls, along with Vault 12 inhabitants (I may be wrong here and only Vault 12 dweller were turned to ghouls, but I think it counts for both populations), and would explain the fact that most of the buildings are still standing by 2160s. It would also explain why Raul thought it was bombed the worst - it was bombed by weapons which cause far greater fallout than have a blast radius and force.
But this is only speculation.