Biology is popular enough as a major, and medical school (which does not require any specific major) is popular enough as a post-graduation goal, that most reasonable colleges, including LACs, have good offerings there. Smaller departments may have fewer subareas to take advanced courses from; whether that is an issue for you depends on your interests (you can look at on-line catalogs and schedules to check what advanced courses are available at each school).
Also, do not worry about the degree title BS versus BA. If the school offers both, you can choose based on which version’s requirements fit your interests better.