Just from looking at the map I would put most of my effort into the north half first. Between the island and the bottle neck would be the first spot I would try. I'm not sure what fish cribs are but I assume some kind of fish structure. I would sure think crappies would hold near and move between them even if they aren't very big. I think I would work my way up the right side shoreline near sundown staying just out from the steepest part of the drop off. I'd work it all the way up to the thumb like bay at the top.
This is all speculation because things like water clarity and pressure can make a huge difference. Normally I find crappies shallow in murky water, deeper and tighter to cover when it is clear or there is more pressure. If it is a murky lake the south end around and between the two 15' hole looks interesting to me.
I'm betting they will normally be suspended in that lake also. If you have a flasher watch it carefully and if you don't make sure you come up over half way up every once in a while. It may take more then a couple trips to figure out a spot or two.
Good luck, looks like a nice lake. Now go try it and tell me if I am even close.
Tim
