Shovelhandle- i have spent a lot of time in helicopters- I once spent an entire day on a search and rescue- it is amazing how difficult it is to recognize anything from the air- we would fly directly over groundsearch team and not see them- A casual flyover my plants would not alarm me at all- now if they have those infrared cameras attached to each skid look out
best in your grow I too am growing blueberry this year in an outdoor grow