I lived on a farm here in northern Ontario, it backed onto a swamp.... I couldn't go outside my back door after dusk without getting completely attacked. I bought a blue rhino skeeter vac, the 1 acre model. It takes a few weeks to get the population down, you need to buy a scent block that sits on top, as well as a sticker trap that goes around the top part.... Try run about $20 for 1 scent and $20 for 2 sticky traps.... I found that first sticky would last about 2 weeks, and then about a month of each sticky after.....
They work very well here in Canada and I imagine they would work well in DR as well...