I did a little more reading.. and I think that the sensor bar doesn’t actually sense anything
I could be wrong but i think it’s just ten led’s in a box that are powered to blink and then the wii remote uses it and somehow knows where everything is.. so the sensor bar is just a simple marker.. if so then you could technically just leave it connected to the wii with the power turned on if you are using your tv to play it..
then all you really need is the dongle .. I’m going to try this out as soon as I can get one of those dongles