Greg,
Over many years I have attended many corporate, golf oriented boondoggles. By far, the vast majority have not included spouses. For example, 4-5 times I was the guest of CSX when they used to own the Greenbrier. Spouses were never part of the deal.
I'll admit, CSX, a big entertainer, did invite spouses to the Masters (hell one time they even let me bring my teenage daughter!), but that was the only event of various invitations I got to golf resorts that included the wives.
I do, however, wonder about summer weather being an issue. Have to think morning rounds will be preferred.