Interesting topic!
As I have mentioned before, I am a
little obsessive when it comes to cleanliness

.
I always clean our dishes and cutlery, firstly I cant handle allowing them to be dirty for any extended period of time and because I would feel bad to leave the dishes for the staff to clean. Even if they did clean them, I would still re-wash them just to be sure that they are 100%......

In fact I realised that I was spending too much time cleaning that could have been better spent and now bring along very good plastic plates that I throw away after use, only use tea cups and cereal bowls etc..
We keep the bungalow as tidy as possible. We also make sure that 'our' attendant will be there the day we leave and make sure she gets a tip..usually R15 - R20 per day..sometimes more, depending on service. We definitely leave unused food items in the fridge; eg..milk, fruit, veggies & meat, it is most appreciated.
I agree about the cleaning of the braai..I am sure that the attendant is the one who cleans it...
I think another aspect of bungalow etiquette or general camp etiquette would be that of being good neighbours. Loudness is really the only problem that we have experienced in terms of those around us on occasion. We mostly have like minded neighbours but have had some that are less so. Be considerate and know that sounds carry in the bush AND that if your neighbour's lights go off, they have probably gone to bed, so once again be mindful of others. We once had people shining spotlights at our windows while we were trying to fall asleep and they were rowdy...it was really not in the spirit of being in the park...but as I have said these experiences are few. Everyone is a first timer to begin with so perhaps a discreet notice of some kind would be helpful in educating new or uninformed visitors.
Once again, a really useful topic, well done!