Pardon me since I'm kinda late to this thread.
I have only done 1 successful BBG back in 2014 so my experience is limited. I went 1,528 miles in 23 hours and 40 minutes. I would have finished sooner with about 10 less miles, but near the end of the ride I followed an 18-wheeler ( ya, I know I shouldn't have been following an 18-wheelr that could have blown a tire ) right off the exit onto another highway - both right hand lanes were the exit lanes. I was in the second right hand lane.
I'm a slow stopper - about 14 minutes ( get off the bike to gas, pee, and hydrate ) for 5 of my stops and 25 minutes for the lunch & dinner gas stops. So I used up 2 hours for stops on that ride. I usually just get a sandwich out of the cooler at the gas station - no bowel issues with that over the years. No way I would chance an egg McMuffin or whatever it's called a BK. And no way I would chance a dog off the roller. A slice of pizza I'd might take a chance with if it looked like it hadn't been sitting there for hours. Any GI problem would be problematic on a BBG.
So my moving time was 21 2/3 hours for a moving average of 70.5 mph. I did this ride all in Michigan when the speed limit was 70 mph on most expressways outside the cities. The unofficial speed limit is 78 mph ( per a State Police Lieutenant ). So I was doing that most of the day ( except for a few slow downs through construction zones ) but slow down a bit at night because of the possible encounter with wildlife.
I usually need a sugar-free energy drink at 2 pm ( siesta time ) and at 2 am. I plan my rides so I avoid cities or will be going through cities only at night. I double check ( call ) the stations I'm planning on stopping at night to make sure they are open 24 hours ( Google Maps is good for a preliminary check, but call anyway ).
So, I usually do about 190 miles between stops. If I extended that to 225 miles ( which I could easily do with my 7.3 gallon tank ) I could eliminate 1 stop. But it's nice to be able to get off the bike more often to stretch ( especially at my age ) and I did the ride within 24 hours with the extra stop. And that would only save me about 15 minutes by eliminating 1 stop.
So 5 minutes stops aren't really required to do a BBG. A friend of mine did a BBG in a little under 23 hours and he said it was a tough ride. Ya, I can understand that. It was probably pretty stressful to do it in under 23 hours. Minimizing stress is important for any IBA ride, IMO.
I keep the plan for my ride on the top of my tank bag to check to see how I'm doing time-wise at my stops. I have the planned departure times noted there. See an example attached.
For some strange reason I don't get as tired after being awake past my bedtime as when I was younger. I do make sure I get a good nights sleep for a few nights before I do a ride like this, although doing a SS3K in 2020 wasn't that hard of a ride. The hardest part was riding home from the Chicago area the day after the ride - it took me 8 hours to do about 300 miles but I was stuck in a traffic jam due to a roll-over accident for about an hour in hot weather.
This pic was taken in the summer of 2020 at the beginning of the COVID pandemic.
I think if they really cared, the roller grills would have been shut down permanently.