Swathmore has a great engineering program. It isn’t at 3+2 or anything like it. It’s just a 4 year program. But as others said, at least one of your “backups” are reaches for everyone. You don’t understand the difference between LACs and universities. LACs are focused on undergraduates. They usually don’t have grad programs (at least not beyond a few MA programs). Some are among the most competitive (to gain entry to) in the country.