It wouldn't hurt to use a little soapy water on the rim to help things slide into place. Of course, that doesn't help you on the side of the road, either, unless you pack children's bubble toys...

Those of us who have installed tires on old straight-sided steel rims naturally get nervous at the thought of just adding a bit more air to even out a crooked tire. But with good hooked rims, especially tubeless-compatible ones, it seems that the bead that's a little high will reach a point at the hook where its progress slows, and it becomes easier for the incoming air to push the tire into place where it's still low. Those popping sounds that make you jump at first become a reassuring sign that everything is snapping into place.