You can reduce the field rotation a lot if instead of mounting the Dwarfe vertically on a tripod you adjust the ball head on the tripod so that the Dwarfe II body is pointing at Polaris. The stacking software does a good job of de-rotating before stacking. M81 is almost at the zenith right now so the rotation is very noticeable.
Not seen any sign of a smart (GoTo) GEM scope that does not need polar alignment. If you want to do long exposures to get faint nebula there is no option but to use a GEM mount and guiding. The latest ZWO cameras now include a second sensor that means you no longer need a seperate guide scope and camera, so it's getting better.