A gift certificate for a cooking class. If he doesn't already have an annual pass for state or national parks, you can get that.
What can be a great gift for a 52 yr. old man who enjoys camping & cooking & has everything?
Listen carefully about things he complains about that perhaps don't work well or are broken. Replace it or upgrade it.
A Yeti cooler is a favorite for camping. He might also like a cast iron dutch oven for campfire cooking.
A part of Yellowstone National Park?
Burn his house down.
That will destroy all his possessions, and he'll no longer "have everything".
Lack of housing will also give him the opportunity to camp.