If you have a campsite please park at your site (you are allowed 3 cars per site). If you are not staying at the campgrounds please carpool the day of the wedding. The campgrounds have day use areas where you can park. There are limited spots at our reserved sites.
The weather for Mammoth Lakes usually is not the same as Owen's river. The weather does change quickly at times and can be really warm to cloudy and very windy.
As far as packing I would recommend planning on it being nice and warm. If the weather does get chilly it doesn't last long. Bring pants and a jacket just in case. If you plan on enjoying the river definitely a swimsuit or trunks.