Hi, we are driving to Yosemite from Napa next month. I think it is about a 4 hour trip - can anyone confirm this? I'm hoping to leave Napa early enough so that we can do a little bit in the park that first day. We are sleeping in El Portal and then visiting more of the park and leaving on that second evening. Also, I don't have reservations that second night. Are there a lot of accomodations near Oakhurst, Fish Camp, etc. so I can just take my chances on getting a room? Didn't want reservations as I'm not sure exactly what our time frame will be. Any input will help!