Retreats on Mauna Kea?

[TomK]

Gilbert Kahele Recreation Area has some cabins.  Can those not be rented?

Technically these are located on the Mountain.  I'd correlate them to base camp at Mt Everest

Sorry - missed this earlier. This is the Mauna Kea Recreation Area just by a different name. You can camp there with a permit. That doesn't scream retreat to me unless all camping sites are defined as retreats. I disagree with it being "correlated" to the base camp at Mt Everest for obvious reasons. I'll explain if you really want me to, but Mt Everest base camp (there are actually two of them) isn't next to a modern highway, is at an altitude of around 17,000 ft and, understandably, doesn't have a play park for kids, picnic areas or parking.