Dont panic too much ,it is best to have a 50% at least Deet Spray,I must admit I went last year and never had a bite or anything as long as you make sure about your Malaria Tablets and take them as prescribed and put your mosquito net over of a night, I was quite frightened but there is nothing to worry about,I didnt even spray my arms or legs and was ok. When you get to Mombasa it's even less. At Tsavo on the last night you are out in the open and most of the dining areas are not covered in so if you are worried just have a good spray. Enjoy cos it is a wonderful trip,I am going back next year to work at the "Tumaini" Orphanage in Mombasa, I visited while I was there and fell in love with the kids so much just going to help out for 3 weeks. Have a Wonderful time cos It's Amazing. Regards Rosemary