Hi,
water thin CA glue (model shops - the pink bottle of superglue) will most likely wick into the crack and hold it together - depends on the crack though obviously.
The worst thing about cracks in guitars is that everyone can't help poke it with their finger - and each person puts more dirt and grease into, discolouring it and making it slightly harder to get the best glue job.
I'd want to clamp up the cracks to see if they can be made to virtually disapear before putting glue in, you may well find it comes together and is virtually invisible, the clean up after wards is worth thinking about too.
- and if you do clamp it up, do a couple of dry runs first!
show us the pics when you get 'em,
good luck,
steve