How effective are mosquito patches? and recommendations?

Yes. Mosquito patches are effective however I do not like to use patches as it stains on my kids' clothes if we didn't remove it before washing. Thus, I choose non-deet and chemical free mosquito repellent like Babyganics Natural Deet Free Insect Repellent. You can purchase from iherbs.com at about $13 per bottle (6oz).