Sounds like they've come up with a way to take a shortcoming and market it as a desirable "unique feature". It appears Middlebury only offers one physical anthropology course (an introduction). It's a fine school; I'd rather see a small number of well-taught courses than a glut of poor ones. But there are other schools that offer a little more quantity in addition to quality.
Beloit is a LAC that seems to have a very strong anthro department.
https://www.beloit.edu/anthropology/
Compare Middlebury's single physical anthropology offering (SOAN 0159 Human Origins, Culture, and Biodiversity) to Beloit's 5:
120. The Human Animal
320. Primate Social Behavior and Ecology
324. Hominid Paleoecology
326. Human Osteology
328. Medical Anthropology (not purely physical anthro, but it overlaps)
Other LACs that appear to have strong anthro departments include Bryn Mawr and Colorado College.
Bryn Mawr College: Anthropology Colorado College: Anthropology
Bryn Mawr is a women's college. Colorado College is (like Middlebury) a very outdoorsy school in a gorgeous natural setting, with the attractions of a small city as well as nearby mountains. Their one-course-at-a-time "block plan" facilitates field work and research projects.
Midd is the most selective of all these schools and I understand its appeal. But check out the others. Even if you still think Middlebury is your first choice, you'll need some back-up. Beloit, Bryn Mawr or CC might make good alternatives.