Any Ideas on how to prevent flys around the decking of our Caravan in Alameda Malaga Spain?

Question

Any Ideas on how to prevent flys around the decking of our Caravan in Alameda Malaga Spain?

Answer 1

best thing is the mint herb plant and place on your table also burn some tee tree oil in your burners and place around more so at night

Answer 2

put bags of water(plastic, transparent) on every window and door,when the flies see their reflection they get scared and go away