We spent a week at Grizzly in West Yellowstone and toured the park each day. It depends on what you like to do. We hit every side road and pull out. Saw Moose, Elk, Bear, Beaver, Wolves, Owls, everything but a Bald Eagle....if you like getting out of your car and ENJOYING the park, best plan on a week. If you simply want to say you've been there, then one day on the south loop and another on the north loop will git r done!.....Dennis
@jbob..when you're 45' long, staying INSIDE the park is OUT....just sayin'...:B..D