We fly out to Boa Vista ( Riu Karamboa) on 5th April. Can anyone tell me if mozzies are a prob at the mo? ( Thomson blurb with my tickets mentions dengue fever is around again???). We plan to get some repellant with deet but which is the best brand to get and are the wrist /ankle bands any good? We have 2 children aged 10 and 7, so really want the best protection. Many thanks.