Banana bread should be moist after baking. If yours is too dry try adding more banana, apples, or even sour cream to the mix. This is a page about making banana bread moist.
Banana bread typically splits while baking there is no problem with this occurring, but sometimes the split may be minimized. This is a page about keeping banana bread from splitting on top.
This is a page about freezing banana bread. When next you bake some delicious banana bread make a few extra loaves and pop them in the freezer. This is a page about freezing banana bread.