Dog in heat ???????????

i live on a farm and my dog is in heat and another male dog from a few farms over came over to my property ( i forgot to mension my dog has her own outdoor kennel ) and the dog has not left in 3 days , i have a male bullmastiff who roams the property as he pleases but my dog is friendly with the strange dog so he will not leave , luckily the strange dog is actually friendly , i am afraid that after my dog goes out of heat this dog wont leave because him and my dog seem to be friends . and i cant just go knocking on doors asking people to take there dog because out here in the farmlands people are weary of strangers people let there dogs roam free out here ( to protect the animals ) so yeah , you cant just go to someones house because if you get out of the car your getting bit ( there is also theifs out here thats another reason why people let there dogs roam the property ) so what can i do about this dog problem ?