Sadly yes you are @Laura2592 when people travel it helps to spread the virus however remote your cottage. It is not about whether you are personally at risk but you encouraging guests to come into your community.
I work for our National Health Service and have seen first hand the impact on our health service who are struggling to cope. This will only get worse as the numbers needing hospitalisation increases.
How are your health services coping. I heard in the US although you have limited amounts of tests being provided for free your government is still making people who have the virus pay for treatment. Which means the poor who can't afford care will be left untreated and more vulnerable to spreading the virus.
The only way we can slow down the spread of the virus is by practicing social-isolation yourselves and not accepting bookings in the coming months.