Skyline,
I agree with you on the discount for multiple hunters-I have found this to be true as well.
I can vouch for this particular area in my home state as well as for the guide Bill Earl. Bill's knowledge of whitetail deer as well as the area are second to none and I know of few guides that work as hard as he does to put his clients on deer. Hammells made a very wise decision in acquiring Bill's talents-one that will pay big dividends for both the outfitter as well as the clients.
I believe that a good guide (having served myself as a fishing guide for a period of time) imparts his knowledge unto others whether afield or on the water. There are many that will put clients "on game" or "on fish" but don't necessarily increase your knowledge of animal behavior or seasonal migration patterns/routes that work in concert to make you an overall more successful hunter or angler-whichever the case may be.
Bill makes suggestions based upon your feedback and his knowledge of the area and the local whitetail population. The decision ultimately rests with the hunter as does the 'moment of truth' when it's just you and the deer.
I personally am looking foward to checking out Hammell's sometime in the near future!