Okay, next summer I am going to Iowa. In which is were my step dad's parents live. He is what you called a professional woods man or whatever. But we"ve decided to build my own bass. So what are some things I need to know. Like measurement, what woods, designs, and anything else.
err a good place to start is getting a book. or just looking at a bunch of bass build threads. i personally haven't built a bass but i have built guitars. pretty much the same thing though i guess.

you'll need to pick out a good wood for the body like ash or alder or something like that would be good for a first build. you'll need to make pickup routing templates, and a body template. and get all your measurements for your neck a good neck wood would be maple. you'll probably need to buy a fretboard because the tools are pretty expensive to make one.