Should you have a diabetic condition; there are no grave situations you should be concerned about while traveling on safari. A great deal of the meals provided to you on safari will likely be very similar to what you habitually eat at home (e.g. marinated chicken, beef, salad, fruit, etc.).
However, be mindful that some packed lunches supplied by the lodges or tented camps may include foods high in carbs such as bread, fruit, and juice boxes, as well as other foods high in protein. With regards to essential diabetic medications and supplies, make sure to carry a letter from your doctor stating said supplies you will be bringing with you and a copy of the actual prescription is also recommended.
In addition, carry hard candy or glucose tablets with you on game drives or other safari activities. Insulin-dependent individuals are encouraged to pack more than one bottle of insulin and extra pump supplies, as they are not available to purchase in Tanzania.