Thanks for the replies.
The tanks are inside a heated building.
I am leaning toward a stand-pipe/ stilling well of some sorts with a screened inlet, with possibly a water flush line to keep obstructions from the screen, or even putting a '90' inside the tank and point the inlet down to reduce the chances of material caking on the screen.
With a bubbler mounted on the top of the tank and the 'bubble pipe' extending the full height of the tank, the pressure corresponding to the level would essentially be the same as a tranmsitter mounted on the bottom of the tank? 2.31 feet per psi?