[Gardening] Raised beds vs Voles

I've been wanting to dig up the backyard for vegetable gardening but have been put off by the amount of work allegedly required for vole combat (and my yard is definitely Vole City): online research recommends digging down a foot or so and lining sides of the bed with hardware cloth, etc.  It's not clear, however, whether that's required for raised beds as well as ground-level gardening.   Does anybody have experience in this regard? I'd certainly welcome any advice.   Thanks, Judy