My parents used mosquito coils when we used to camp, and they seem to still be an effective mosquito deterrent when placed strategically around the setting in use.

These coils really work! Having tried in vain to find an outside repellent that goes on an on (sprays, oils,etc) I tried these not really expecting much … Joy, oh joy, mozzies be gone! I burn these on the veranda and balcony, and low and behold, the mosquitoes are kept at bay! Being so susceptible to mozzie bites, these have been a godsend for me!