Groveling for gravel

So my father has proposed a fun Thanksgiving weekend activity for the family during their visit here… putting in a concrete floor for an addition to the house.

My dad, when I was a wee one and my mother was pregnant with my brother, built a house. He just found a book on how to build a house, and built one. It was an a-frame, and to his knowledge it still stands. He has a bit of credibilty, though I’ve never seen the house in question.

The idea of hauling in 10 tons of gravel and mixing up a slab’s worth of concrete doesn’t seem like a big deal to him. To me, it sounds like a recipe for trouble. But I’m going to put my trust in the man and do the legwork to make this thing happen. Worse case, I figure we waste a vacation and end up with a misshapen concrete blob behind the house.

To that end, does anyone know a good source for 10 tons of gravel?