You can drive seven minutes up the road from Tenaya to reach Yosemite, or sign up to join one of the tours of the park that start from the lodge. Note that a $2 reservation will be required for day trips to the park. (Our venue is outside the park, so you won't need this reservation just to attend the wedding.) For more information, click this link: https://www.nps.gov/yose/planyourvisit/reservations.htm
There are several things you can do at the lodge itself, from visiting the spa, to going on hikes, to climbing on a rock wall, to taking archery lessons.