Either will provide tick protection for a month. There is some question about whether Frontline is suitable for goldens, however. A good pet vet will know. Pennyroyal contains pulegone, a powerful natural insecticide. Other mints lack the toxin, but may be effective against insects as well.
Fresh basil works too.
Rough the skin of a lemon, orange or grapefruit with a fork and apply it to the dog's fir. Or, you can purchase essential oil of citronella, pennyroyal, lemon or lime. Dilute by mixing with three parts of any light vegetable oil and rub into the dog's coat. These aromatic herbs can be applied to your own skin or clothing before a hike in the tall grass. The pulegone that pennyroyal contains is toxic to animals as well as bugs.