However, I have seen a full spectrum of trek and workshop leaders over the past three years on the eight photo treks I have taken (trips that I had to pay a fee to attend). I also compare them to guides with Overseas Adventure Travel (OAT); my wife and I have been on five international trips with them over the past five years.
I keep a spreadsheet of costs per trip, and I compare it with costs of prospective trips...yes, I am anal about costs. Why not...once spent, it does not come back.
Anyway, I came up with a rating system today that will normalize my spreadsheet based on the leader/guide and the quality of photo experience I have had or expect to have based on my experience with guides.
My spreadsheet calculates cost per day for a trip. I then divide that by the quality of the leader on a scale from 1 to 10 with 10 as highest quality. I can then look at the bottom line to see what trips cost the least per day and which trips give me the lowest cost with quality factored in.
So far I like what I am getting from the spreadsheet. It will help me pick future trips better than I have done in past years.