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This is what i found on PDGA
Vichy is nowhere near Branson. It is about a 3 hour drive. But you are correct, it is one of the hardest courses around. It is a private course, but if you talk with Dave McCormack (Gateway owner), he can usually set something up for you.
I have heard that there are some nice courses in/around the Springfield, MO area. That is only about 30 or so minutes away from Branson. Looking at DGCR, it looks like Grubaugh Park might be a fun course...