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There has been a great deal of interest in realizing unconventional quantum disordered magnetic ground states in frustrated antiferromagnets driven by strong fluctuations in the small spin limit. Experimentally, real materials often preclude this limit due to symmetry-breaking structural or magnetic processes or innate chemical disorder that lifts ground state degeneracies. NaYbO₂ (R-3m) contains geometrically-frustrated triangular layers of J_eff =1/2 Yb³⁺ ions with ideal chemical order, a robust lattice geometry to 330 mK and lacks conventional signs of magnetic ordering under zero-field conditions to 50 mK. Under a moderate applied field, NaYbO₂ enters an antiferromagnetic phase below 1 K. This material stands as an appealing candidate to realize a dynamically-disordered quantum ground state driven by highly-anisotropic, spin-orbit entangled Yb ions whose transition into a nearby field-driven magnetically-ordered phase can be probed experimentally and theoretically.