Undoubtedly worth a try but you may have difficulties finding the target without a well-calibrated mount and having suitable comparisons in the FOV might also be hard. It goes without saying that the sky brightness will be so perhaps observing in the red and near-IR (r’, i’, z’, Rc, Ic, etc) might be advisable.
One of my images of a Venus – Neptune conjunction shows a 12th mag field star in a 2 second exposure in i’ — though not bright enough to be measurable, taken just 37 minutes after sunset. Essentially everything on the binocular program should be accessible.
Thanks for a good suggestion, I may try it when back in La Palma.