I think that's a good idea, but even though it will obviously be off while I am flying I do have to stay quite close to it when there are people around lest anyone thinks to try and walk off with it while my attention is focused skywards ! I'll do a couple of tests in the next few days all being well, but I think if I keep the 2 machines 15 ft+ apart all the time that should be fine...
A corollary question arises when we want to actually ride around and record / track with the drone. Some wheelers I know actually put the RC down to do this, but I think that's madness so I would much rather keep it with me and risk damage to it if the wheel cuts out and I crash. Here it's not drone proximity to craft I worry about but rather controller proximity to an active electromagnet kicking out up to 9000 watts of power.