We introduce the SAGUARO GW optical counterpart search strategy , where we tile the highest probability regions of the localization with the Steward Observatory Mt. Lemmon 1.5 m telescope and its 5 deg 2 imager . With this facility we obtain observations covering 60 or 120 deg 2 down to ∼ 21.3 mag within δt 30 min of receiving the GW alert if it is observable . We also present the SAGUARO software suite that we utilize to trigger the observations , process the data , and display the candidates for vetting . The robustness of this system allows us to start tiling the localization within minutes of receiving the GW alert and produce lists of candidates within hours .