Not unless you want to get in trouble with the law. Many parks have regulations against open consumption of alcohol 
Indeed. I stayed at Bryce Lodge a few years ago. The weather was vile, but there was a good fire in the lobby, with armchairs around. I ate in the restaurant and drank some of a very acceptable Shiraz. I then went to sit by the fire and play with my laptop, taking a glass of wine with me. Fairly soon, I was told that while drinking it in the restaurant, not ten yards away, was acceptable, it was "illegal" to finish the wine in the foyer from a glass. I was offered a mug into which to decant it and continue drinking.
As the slogan on a mug once read, "Eat, drink and be merry, for tomorrow we could be in Utah".
Jeremy
