You could go ahead with your plan to create a printout with about 5 stops difference from dark gray to light gray, and then shoot two shots of this "short" grayscale at different f/stops to cover appropriate exposure sets. (Like Meter and Expose for the darkest gray to be Zone V, then you can get Zone VI, VII, VIII and IX... Meter and Expose lightest gray to be Zone V and get backwards Zone IV, III, II and I).
Originally Posted by lhalcong
With a transmission stepwedge, there is a 4x5 sheet that you can tape to glass and light up from behind. Or you can get the 1/2 inch strip and lay it in contact with a strip of film pulled out in the darkroom under your enlarger for about a 1 second exposure.