One good practice is to get one of the crew who likes to do a little work to take ownership of all aspects of the dinghy and make a couple of trips at some stops. There is really no need for the entire group to always stick together. An early group can always head in and hold the bar down for the slower moving part of the group. If you do have two and even when we have one. We try to have designated crew to always man the painter(s) each time the boat is underway. That individual leadership will also be tasked with ice and cooler management along with getting the trash off the boat. That role starts at checkout to make sure you have a outboard that is easy to start and you fully understand anything unique about the outboard in dinghy. In your case what is the best way to tow it at speed.