kpc "Does anyone feel weird too a bike rides just laying your bike down and walking away to use the porta john?"

yeah, I do, but what I do is this.

Your best option if riding with a group is to prop your bikes up like an A frame. Like horses lounge about head to tail each switching the others face of flies...you line your handlebar up with your friends seat/rear wheel and they lean on eachother, both bikes stand up! To further keep them together use your gloves and or helmet straps to loop together at some point.

Second best is there is nearly always something to lean the bike on, tree, fence, rock...you can use a curb, pedal at 3 o'clock and sometimes that's enough to lean the bike on. It's worth the extra few yards to find a clear space vs hours of cleaning the chain etc

If you have to have to lay the bike down make sure the derailure side is is up