I have eaten at Whiskey Creek in Bishop many times and the food is always good. This trip we decided to try Whiskey Creek in Mammoth and it was just okay.
Our server was short with us, didn't put a lot of effort into being friendly and simply did her job.
The food, ehhh, average. The burgers were okay, but average. I ordered the Pulled Pork Sliders and again, eh, average. They didn't have a lot of sauce on them and were rather dry and the sweet potato fries again were average, I have had much better.
Whiskey Creek is one of those restaurants that will always be in business because there are limited restaurants in Mammoth, but there are some great ones opening, go elsewhere.