Help?

I feel sort of silly reverting to this, but I could use your help!

I have been chosen to put together our family reunion this year! I am in charge of all the planning for all of the family members across the country-- lodging, food, activities, etc.

Now for the reason for the post-- I need to find a venue to host this year's reunion. I can't find anything! I have a budget I have to stick to, so I need to find a place for around 50 people to camp in tents with a building that we can eat in and have our activities. My budget for two nights for the lodging is $500-$800 total.

I would prefer the venue to be in Utah or Southern Idaho.

If any of you know of ANYTHING, I would GREATLY appreciate your input!! Thanks!