By Tracie Cone Published Aug 29 2013 11:46 PM EDT Associated Press SACRAMENTO, Calif. ??? The huge Sierra Nevada wildfire and its smoke plume have caused some fearful tourists to opt out of plans for the last big travel weekend of the summer, but most appear intent to go through with vacations to destinations such as Yosemite National Park and Lake Tahoe.Those who keep their hard-to-get Labor Day