Rentable vacation-like outdoorsy retreat venue for conference?
I would like to host a nature-based conference for 10-20 people in my profession next year and have started searching for locations to rent to host the event. We must be near nature, have various sleeping options (outside in sleeping bag, shared room, or individual room), and have good healthy food prepared for us on site. We will need to have access to outdoor spaces for some experiential components. I'm really open to any location in the US, but California-based centers would be ideal. I want it to be a destination retreat...meaning: people will come to learn something but they'll also come because it will be a beautiful and relaxing place to stay! Do you know of any places like this?