Diabetics (be they type I or type II) can have issues with body odors increasing secondary to their blood sugar variations. Namely, high blood sugars produce ketone bodies which are secreted through the breath, urine and sweat glands. One of the signs of low blood sugar is becoming sweaty and pale. This, in turn, also can increase body odors. Insuling itself has a strong smell, but this is only an issue for a patient wearing a pump, and I am not certain that bees would care about the smell of insulin. I have read that bees do not like us when we smell bad - irrespective of whether we are diabetic or not. Showering will alleviate many odors, but dietary changes which maintain blood sugar balance will also decrease odors associated with diabtetes. That means, eat fewer refined carbohydrates which cause sugar spikes and avoid greasy meats and saturated fats. Fruits, vegetables and lean meats and fishes serving as a primary foundation of the diet will reduce many offensive odors as well.
My son is a type one diabetic on insulin pump therapy, and we have no issues going to the hives. We both, however, watch how much honey we eat. Honey to a diabetic is like rocket fuel to a campfire. Enjoy it, but sparingly and with appropriate insulin dosage.