Brettski, I'm glad you like the pier. We put a lot of work into it. The posts are 6x6 treated yellow pine. We dug holes with an 8 inch auger and poured quickcrete around the bases, then just added water. We were lucky because the water level is down enough to do it that way. If you have any other questions, or want to see more photos, let me know.
The type of boat we plan to use for the ramp is probably a mid size bass boat, aluminum hull, or flatbottom type. That's why I'm leaning towards gravel instead of concrete. But if it doesn't cost that much more, I would rather overbuild it and not worry about it.
