Survivability is one of the core principles of 12b, so I've had to do my share of bunker fortification. Usually followed by a nice roll of single (not bad) or triple strand (terrible) c wire.
In today's reality you'd be doing that in full kit, otherwise some f**ker might take a shot at you noticing you without it on.
Thankfully I was in a sapper unit though, and I didn't have to do it all the time. Instead we would just get attached to a maneuver unit and blow up obstacles in their way and then act as direct support for them when they moved to the objective. Which is nice, because that is absolutely miserable work when its a 115 degrees outside and you are in full kit.
Especially when in the field no CO actually uses the work/rest cycle. You just go until the job is done and move onto the next one. If somebody has heat exhaustion, well too bad for them.
