A few items that come to mind:
[...]is there a Saturday morning traffic of vehicles towing boats - or something similar.
Good point. A ranger in Yellowstone advised against riding in the park because many tourists rent large RVs and have difficulty estimating width. (I e. Driving as if it were their city car). Still, we're planning on riding the loop, over several days, typically stopping for the day before noon.
(Interesting. Those questions never bothered me when riding alone. It is the little ones who are changing the perspective...)