When you boil your ribs, take a look at the water. See all that stuff in it? That's juice and flavor that just came out of your ribs. Not a good thing.
As far as dry on the outside goes, a little bit of bark is a good thing. But, if you or your family don't like them that way, wrap them in foil at the very end. The steam will soften that outside up.
As far as foil wrapping goes, the most common method is the 3-2-1 method (for spares, not baby backs). 3 hours in the smoker without foil, 2 hours with foil, and the last hour without. This allows the initial smoke penetration, then the foil does a little steaming, then the last hour helps put a little bark back on.
I like vegetarians. Some of my favorite foods are vegetarians.