Do some feature finding, check depths, what the substrate of the lake bed is like, species of weed etc and then, record what you’ve found in a notebook.
If it’s possible and allowed, it’s worth having a climb up trees and recording what you see. Carp tend to be like sheep, in that they’ll follow the same trail regularly. Also, don’t forget the margins.
Observe and take note of how the carp are affected by the the elements, the presence of other anglers. That sort of thing.
My starting point when I do actually go fishing is: target areas of the lakebed that feels as clean as possible and bait those areas, and if possible, keep on baiting them.
But, if the venue you’ve chosen is always busy, just get in where you can and hope for the best!