@Julie1525My place is also rural, and most guests fly in to the airport and take the bus to my town, an hour from the airport. So they don't even arrive with transportation. I'm quite clear in my listing that it's a 20 min. walk to town and the beach (more or less, depends on how fast one walks, but that's the average, it's about 2 km.) and I reiterate that when they book, just to make sure they read that part.
I also market towards the type of guest that will be a good fit here, and so far, that's what I've gotten.
All my guests have been lovely, for the almost 3 years I've been hosting. I'm a single woman living alone renting out a private room/bathroom and no guest, male or female has made me feel scared in any way.
But if you feel nervous having strangers in your home while you are alone there, get yourself a can of mace or bear spray. I'm sure you'll never have to use it. And put a friend's or neighbor's phone number on speed dial.