Reaching Alcove Gallery means hiking into Horseshoe Canyon and climbing back out. The full walk to Great Gallery is about seven miles round trip, with a steep 780-foot descent and climb; Alcove is one of the earlier panels along that route. Expect uneven rock and stretches of sand.
There is no water at the panel, so bring your own. The West Rim trailhead has a vault toilet but no water. The long dirt approaches can change quickly after rain or shifting sand; check the current road report before driving in, and use a map rather than relying on GPS.