For this natural mosquito repellent, recommended by clinical herbalist Michael Vertolli, modify the essential oils and their ratios until you find something that pleases you but not the bugs.
1/2 cup olive oil
1/2 cup almond oil
Contents of eight 400 IU vitamin E capsules
3/4-1 teaspoon (or 3-5 mL) each citronella, pine and eucalyptus essential oils (roughly 80 drops each)