my team is also comprised of two high schools (Pascack Valley and Pascack Hills). we meet everyday after school and on weekends at Pascack Hills though. Students, like me, who go to Pascack Valley either drive themselves or car pool up to Pascack Hills. If parents work the students should get their rides when the parents get home. Our team meets until late into the night so members that come a little late are still able to contribute during the build season.
Also if students are really desperate to get to the other school couldn't they just walk? Sure it might take longer, but exercise isn't always bad
. And if they don't want to carry their backpacks maybe they could arrange for a neighbor or someone to bring it home (they could pick it up later)