Carleton is definitely not chill (nor is Williams from your other thread.) Transferring to Williams as a 4 year
Posters really do need your college GPA, whether you have budget constraints, and results from last year to best make recommendations.
I agree with some of the recs so far (rochester, Oregon, UVM, Madison, Lewis and Clark, Whitman) if they are affordable and/or you are open to bigger schools. Staying with smallish schools for now, maybe also consider Vassar, Kenyon, Occidental, Santa Clara, Pitzer and Colorado College could fit. IME Swat, William and Mary, and Purdue aren’t what I would call ‘chill’.