It may also be convenient to try a few exposures on the same sheet of 8x10, in a similar way to a printing test-strip. You will need a film-holder with a well fitting slide and probably shoot the test subject indoors with artificial light - both points in order to reduce the possibilities for light-leaks via the light-trap. Make multiple exposures, three is do-able, withdrawing the slide partially for each one and remembering the time is cumulative.
Keeping a constant aperture, and having the longest exposure as the usual ISO rating (ie. assuming the relatively active developer gives a speed increase over ISO) a three-exposure, two-stop range might be something like 1/30s, 1/60s, 1/60s. The total exposure per strip in this example would be 1/15s, 1/30s and 1/60s. With a carefully selected/made test subject, you would be able to get a good idea of highlights and shadow details much more quickly/cheaply than developing three sheets.
I tried this for pinhole testing, with longer exposures, but ran foul of the imprecision of reciprocity failure . . . too optimistic