Hey Hot Shot, I was in your position 2 years ago. Took my wife & kids out west for a few weeks. Rushmore, Badlands, Yellowstone & Grand Tetons. Brought my M&P40 and bear spray. We were fortunate enough to see a gorgeous, huge, grizzly our first day in Yellowstone. He was about 75 yards away paying us no mind. I must say, I was not prepared for just how big these things are, and how vulnerable I felt. We got a few pics, and a shaky video lol before he moved off. We were lucky enough to spot another grizzly and 3 black bears during our trip. Though none as close as that first one. While I felt confident with the 40 for any lesser animals, and certainly any 2 legged vermin that might pose a threat to my wife & daughters, I quickly realized that I was glad we had bear spray. Next time I'll be wearing my new 4" 629, but the bear spray would most likely get pulled should a bear show any interest in us. JMO. In any case have a great trip and enjoy what I think is some of the most beautiful country out there.