First of all, please refer to this study from Oxford University on use of Camphor, Eucalyptus, and other terpenic balms and compounds on children. Please be aware of their safety if they are in the vicinity and make certain they are not exposed to them in excess, as they can absorb harmful amounts through their skin if not carefully moderated.
If you're looking for a "home remedy" type solution, here's a fairly simple yet effective method that I've successfully tried myself. The quality of the video itself is lackluster, but the contents disclosed are solid.
Another good method would be mosquito fish. I just posted this up on a different forum, so I'll just quote it directly here:
...I would strongly encourage you to ask the county for what's colliquially known as "mosquito fish". I'm not sure about Riverside, but when there was a West Nile Outbreak in Fontana about a decade back, the city would distribute these fish for free; you can also find them at larger aquarium suppliers. These fish are a genetic variant bred specifically with special traits that allow them to survive and breed under conditions such as standing water and lack of heating, and they feed on mosquitos and their larvae. We had a 100 gallon outdoor tank that we kept out in the open but to the side of the house where there was the least amount of foot traffic, covered with chicken wire, and added some java ferns/moss to give the fish cover to work with. Any mosquitos within the immediate vicinity of the property would naturally be attracted to the tank first, and then fish would then happily do their job. This method may seem counter-intuitive, and there's the added element of risk when you're creating an attractant rather than a deterrent, but it is arguably "green" as a pest control method and I can vouch for it's effectiveness...
EDIT: For scientific references, please refer to this and this article as cited in the Oxford paper (#2 & #6) and pointed out by @CareyGregory.