I've discovered that repellant products containing Picaridin, like Cutter Advanced work really well.
We are devoted users of Cutter Advanced with Picaridin. Last February in Belize our family of four had ZERO problem with bugs. And I am a bug magnet. Also picaridin is perfectly safe to use on small children, babies, etc. That's why it's so much better than DEET for us. You can find it online at REI.com, etc.