Travelling Companions..Beware

I recently returned from a remote area trip wherein the group of 5 vehicles split into 2 groups. A very unsavoury situation where 2 vehicle left the remaining 3 vehicles and pushed on ahead of the other, neither group to see each other again. However i know the splinter group returned home safely as did my group.
It all started way back when I was looking to find like minded people to travel over a remote area. I already had 2 other couples attending but I thought another one or two would be a safer bet ie a total of 5 vehicles.
When choosing people from either a forum like this one or elsewhere make sure they are like minded people who have similiar interests and have a similiar amount of time to complete the journey. Even if you have a weekend together to "Eyeball" each other, may not be enough as it was in my case. As the organiser of the journey I took it as my responsibility to ensure a harmonious group. When the meeting took place it was firmly understood by all that the remote portion of the journey would take approximately 10 days plus a rest day in between.
After many months of planning we all met at the designated location for our remote area journey. Day 1-5 was all OK although I detected a little desention when (shall I call my original crew Gp A and the other Gp B) Gp B were a bit exasperated that Gp A were constantly stopping to "look at the flowers" observing wildlife mainly repiles and Dingos and anything else that took our fancy. Two members of Gp A had a wealth of knowledge of Flora) However whilst we were travelling slowly and trying to stop at about 4.30-5.30pm each night we were "on track" time wise. This was all part of my plan which everyone was aware of.
This trip was only going to happen once so we wanted to make the most of it. Info we had, indicted that an excellent campsite was to be had at a particular location, (there weren't that many decent ones) and so when we arrived at this spot on day 6 at about 10.00am we stopped and I put it to the whole group that (after a successful Recce) that this was indeed the place for our rest day. Gp A were keen to stay the remainder of the day (and night) but Gp B were not and were keen to "Push on and get out the otherside then rest". After some mildly heated discussions all stayed in camp that day but the simbiotics of the two groups deterioated. And so it remained that way until on the 8th and ardous day, as Gp leader I decided to stop at 4.00pm. Gp B were mortified that I should stop so early as "there is still 2 hours of daylight left lets keep moving" No, I said, "the boogy man will still be there tomorrow for you tackle whats 2 hours? Rest now and be refreshed for the next day." NO was their reply "we are going on to recce the creek area to see if there is a way across." That was political speak that I correctly understood to mean that they were leaving, they departed not to be seen again. We (Gp A) continued our journey and thru perseverence successfully reached all the locations that we originally set out to do all be it 3 1/2 days later... and had a great time doing it as it felt that a great cloud had been lifted of us.
Lookiing from Gp B's point of view, they were probably happy to get away from us and get the trip over and done with. Which tells me they also erred regarding the peolpe they travelled with.

So that is my tale bewarned !!

regards