I think it depends on a number of factors.
Generally dangerous game tips appear to be higher than most other species but I think the best judgement is made at the end of a hunt and how successfull the hunt was . On dangerous game I tend to use $50.00 a day as the base for the PH and then a $100 in total for the main tracker then smaller amounts for the other staff. Most people are happy with any amount but remember many Europeans do not tip- even the PH .

US and Alaskans seem to guide you to a band of 5-10% of the cost of the hunt.
Generally cheaper hunts mean lower tips but be considerate if the guide has put a lot of effort into the enjoyment/success of the hunt as you will run across a wide range of competency and some of which deserves very little additional consideration.

The only complaints received are from camp staff who are taken advantage of by concession holders who pay staff very little and they are forced hang around like flies when its tip time.Stuff them - its not your problem.Having said that there are quite a few people-skinners,cooks,drivers,cleaners who need consideration no matter how small.