At home I have blocks  25x25ft 2 wide 11 long.   I also have single row a6ft apart.   
At camp I have them scattered like yours.  
Liming with bag spreaders is not fun.    I have a tow behnd gandy 3ft drop spreader which works great for rows.   Broadcast spreaders make alot of dust, even with pelletized lime.  I'd really like a walk behind drop spreader with larger tires.
You should lime a few trees and see what happens.