Missing the point yet again
There is no suggestion of flying INTO a provincial centre or area of interest. A flight of helos would simply deposit the patrol at a distance from the objective, allowing the foot-sloggers to foot-slog in on an unpredictable axis - anything up to 10 or 12 clicks.
A variation on the well-proven aural deception theme of having the heavy hog team overfly the LZ in trail as two hovering slicks deposited their SAS boys in a jungle LZ might be as follows. 180 flare/hover in a number of locations raising dust - and in one of those locations deplanement occurs. Unless you're under close visual observation, the patrol's infiltration is likely to be unconfirmed/undetected. In the big scheme of things, intentionally generated uncertainty is worth ten times the best camouflage. Drop a few coloured smokes here and there along the way to generate Taliban confusion and R/T indiscipline.
The present practice of foot-sloggers departing the friendlies base towards an evident objective is to give the Taliban adequate time for preparing and manning their IED traps.... and over a very limited number of access routes. We're making it so easy for them to ambush our patrols.
Can't see where slung loads come into this argument. But operating fully loaded helos into minimal pads that have been prepped, are on fire and full of rising ash, while your door gunners are suppressing on twin M60's is just a typical slick pilot's distraction. The really complicating factor in SVN was that frequently these pads would have been blasted out by B52 strikes and be unlandable - as well as being surrounded by 100 ft tall trees of a triple canopied jungle. When you sank beneath the canopy you lost your vital headwind and got the RPM warning beeping - just to add to your angst. The Sqn boggy was always no 13 into a 12 acft pad. Overpitching and hitting like a bag of ****e was always on the cards. Avoiding collision, obstacles beneath and retaining the ability to fly out again was the important part. The difficulties in Afghanistan are only a variation on a well-worn theme.
Surprise and deception remain fundamental principles of war. We should consider using them.