You can shadow during school breaks, so OS or Cornell (ED) would be fine.
What about the volunteer experiences that you will need (direct patient contact, working in underrepresented communities, populations etc)? Which school has more opportunities that are easier to travel to?
This is all assuming that you continue with your plan to apply to medical school.
Also adding that you do not have to do all of this while in undergrad. Plenty take time off to study for the mcats, continue with their volunteering etc.
Best wishes! You should have great options to choose from.