Not sure if I'll be any help since I'm not a 100% unschooler. More of an ecclectic homeschooler. I've never been comfortable enough to go completely unschooling.
I find that a mix of things work really well for us. I had read about unschooling and as much as it sounded great I wasn't so sure if it would work for us going completely that way. You need to be a very creative person to do it. I am creative ,but now that I have four children don't have the time to always be creative.
Unschoolers use everyday life to teach concepts. No need for a math book in the early years, just use homemade manipulatives, board games, card games etc to teach math. Reading, just go with the flow, and go to the library and take out good books. Science and History when they are interested. Unschooling from my understanding is child interest lead. If Billy is interested in snakes, then by golly you'll get a book on snakes, have some educational activities about snakes, go to the zoo, maybe find some games that relate to snakes, etc.
Don't get me wrong unschoolers don't use textbooks , they do. Especially in the high school years. But they don't use an exclusive curriculum. They don't follow any standards( which is fine if you live in a state that has lenient homeschool laws).
I live in Pa, and you really won't find many unschoolers in our state. Our state is one of a few strict homeschooling states in the US. So its very hard to prove what it is you do, because with PA law you have to do standardized testing, portfolios and evaluations. There are some unschoolers here in PA, and they really have to work very hard to prove what it is they do to the state. Not really worth it to me.
But if you live in a state where there are few laws with homeschooling and you feel you can constantly provide the things your child needs to learn then by all means enjoy
I think if if I lived somewhere ike Texas, or Alaska(where there are no homeschooling laws. I'd be a full fledged unschooler.
http://www.unschooling.com/index.shtmlhttp://www.sandradodd.com/unschoolinghttp://www.naturalchild.org/guest/earl_stevens.html