littlehunter,
Our area likely does not get the pressure your area gets, but for certain, it doesn't take long for the geese to get educated.
There are times when less is more and showing them something different is the key as often as not.
There are also times when a bigger spread will pull in the bigger flocks when little sets will not. Buy what you can afford and set out what you think you need. We filled in with home made silhouettes for years and still use them occassionally to hide our blinds in fields with little stubble, or when trying to hide more than just 2 or 3 blinds.
Many of the conditions you mention will effect the hunt. This makes scouting the key. For sure it's more than just looking at where they are landing, look at the size of the flocks, how they appoach, from what direction, where late arrivals land in respect to the geese that are already on the ground. As far as goose hunting goes, obsevation provides the best educatuion.
Variety packs are great for the first few dozen, but after that, you end up with more sentrys than what looks natural. Too many heads up indicate the geese are nervous. More than 3 or 4 sentrys, even in a big spread, are easily enough.

Sure not sayin you are wrong, just seein things from a different vantage point.
Wind at your back . . .