When you make an intentional effort to bring in local guests, don't completely abandon your current marketing strategy. Focus MORE on the ideal customer for your property and who you are best suited for. Then, find ways to appeal to that person within a smaller geographic region. What about you appeals most to them? What will cause them to book a local stay with you?
For example, if your property suits a younger demographic that is focused on organic, healthy eating and green living, you could create a themed cooking experience at your property. Bring in a featured local chef that specializes in healthy cuisine for a weekend, and when guests book a stay at your property, they get the exclusive chance to be a part of this immersive experience.
The key is to think specifically about your ideal guest and tailor your marketing offer directly to what they would enjoy most.