My boyfriend and I are planning a weekend Yosemite Trip in September (after labor day weekend) with a group of friends and need help! We'll probably have 15-30 people. We've never been to Yosemite and have done some research and looks like the Lower Pines Site will be the site we'll reserve, 2 camp sites. We are from southern california and the drive would take us 5-6 hours? We'd leave Friday early morning, 2 nights/3 days. Any advices and/or tips are extremely appreciated! Thank you!