My rules of bike riding on a MMP...
* Ride a hybrid bike (NOT a road bike) so you can SAFELY go into the grass when necessary or desired;
* Check traffic behind you when approaching a divided (single lane in each direction) section. If carts approaching, adjust speed so they can get around you prior to divided section;
*When on full width busy section, stay centered in your lane until adequate open space in front for a pass. Then go to extreme right of your lane, making it obvious you are letting carts behind you pass;
*As appropriate on any MMP section, use your hybrid to go into the grass to let carts pass. You’ll be safe and the cart riders passing you will appreciate your actions.
Primary motivation for all these is self-preservation. The fact that it’s a courtesy to cart drivers is just a nice fringe benefit.