My dd is 16 and is leaving for college next week. She's going to a small, selective, liberal arts school on a partial merit scholarship.
She'd started taking classes at the local community college just after she turned 15.
So, yes, unschoolers can go to college.
My 20 y/o chose not to--he's employed, plus, he teaches and coaches archery at a club and camp, and he's started a small artistic business on the side as well.
So, unschooling can lead to...