Resort Buyout Options

I'm looking for a private resort available for a weekend buyout in the US. We'd love to do something in the mountains but elevation is an issue for some family members so nothing too high (over 4000 ft). Another factor is accessibility aka ideally less than 1.5 hrs from a public airport. Guest count would be about 100-120 and budget is $1M. Any suggestions/testimonials would be amazing!!