Well both the Mic and the faceplate have a button to change sides. I don't prerun or drive anything over 50 on somewhat flat dirt roads, pressing the button on the mic has always been super easy for me ! It can be a little bit confusing to know what side you're receiving and what side you're transmitting if there's a lot of activity on both sides. I generally keep the repeaters on a lower volume and only listen out for information and mayday calls.
I would definitely bet on the fact that the TM-V7 has that same capability. Same as yours, the IC2730A has two speaker outputs: one has both channels if you wish to run a single external speaker (I do, works great) or you can run them separately to have a speaker for each side of the radio.