as a full time guide and lodge owner I will try to give you some insight about the subject of tipping. The avarage tip for a guide is twenty dollars per person per day. That would be for both salt and fresh water.
My feeling on that is if the owner of the lodge or charter is guideing you, they are putting in the same effort or even more. so it is nice to see the tip too. some people tip a lot more than that. If you stay at a full service lodge the tipping usually works out to ten percent of the package price. The lodge staff gets taken care of, with the lions share going to the guide. If you are not happy with the service you recieve, make sure you tell the owners or the manager. If you don't, They may not even know there is a problem. I hope this helps.
Tight lines
R Gray