I've been gluten-free for almost 7 years and just spent most of 2006 living in central Kenya. I've not spent time in Uganda or Tanzania (Tasmania is near Australia, an easy mistake) This is what I know based on my time in Kenya and may help you or others looking at booking safaris. Most of the traditional diet in East Africa is based on maize (white corn), potatoes & rice along with beans or lentils and wonderful fresh fruits & veggies, local milk and meat. Only their chapati (like Indian flat bread) is made of wheat flour. And many Kenyans eat white bread and jam with tea (chai) for breakfast and occasionally lunch. So I found being gluten-free pretty easy as long as I communicated with people ahead of time. In Nairobi there are also health food stores in most of the major shopping malls. These stores and also Nakumat (brand) retail megastores have gluten-free pasta and other offerings similar to the US but a more narrow selection and sometimes higher prices. The one short safari I went on unfortunately had limited gluten-free foods and served primarily wheat loaded pasta and bread or toast etc. I think they do this because it is a cheap food that pleases the taste of most American and European folks and they think we won't like their traditional dishes. I just asked for an alternative and after asking questions about what I could have they made me a hearty omelet w/ veggies and served it with some cut up fruit. I did certainly find it helpful to have some gluten-free energy bars to stick in my daypack in case while we were out I found that "lunch" really just meant bread and sodas...which happened only when I was with an all Kenyan group. I would suggest you contact your safari operator ahead of time and ask about their ability to accomodate special dietary needs. You will need to be specific with them about what he CAN have because they won't usually know and will feel intimidated by the diagnosis. But there should be no reason they can't take care of him and save you the struggle of carrying so much food in your luggage. Also make sure the airline you are flying knows of his needs. I know British Air is very good about providing gluten-free meals as long as you register for them ahead of time. Have a great trip and take lots of photos.