Yehudi Menuhin, Itzhak Perlman, Sharon Isbin, Maxim Shostakovich, the Mormon Tabernacle Choir, New York Philharmonic, Audra McDonald, Renee Fleming, Yo-Yo Ma, Norah Jones … A guest list like that requires appropriate accommodations. And for 50 years, the Grand Teton Music Festival has been able to welcome such world-class musicians —...