I attended UW, live in Seattle, and am affiliated with the university. One of my daughters attended Wesleyan, though as a physics, not a psych, major.
My D was admitted to the UW honors college, FWIW. But I am guessing most if not all of her reasons for making the choice she made, which included athletics (recruited to both schools for her sport), would not be applicable to you, so I won’t go through it.
I love my alma mater and I think it’s one of the most beautiful campuses anywhere, and people who disagree with that assessment generally have no or bad taste. But it’s very big. I didn’t know about small schools back then and for whatever reason appreciated the anonymity of the UW experience. Looking back, I may have benefited from a smaller college, but I did well nonetheless, and in a way I had a “sort of” LAC experience in the philosophy dep’t, which wasn’t then a hugely popular major.
My D loved her 4 years at Wes and made friendships that have only grown stronger since her graduation, now a few years ago. Wes proved to be a powerful launching platform for her and she’s done very well, though she gets most of the credit for her own outcome. UW has a tippy top psych department but Wesleyan has a strong department too and the LAC model provides some things that are harder, and some things that are impossible, to get at a huge flagship. One nice thing about Wes is that, though it is a small college, it is on the large side of LACs and it’s not out in the middle of nowhere. So, for a lot of people, it’s the Goldie Locks “just right” size and location. Lots going on at Wesleyan all. the. time. It’s not a sleepy little school by any measure.
FWIW, you can still be a big Husky fan if you attend elsewhere. We won’t cancel you!
But attending UW is a perfectly rational decision as well.
I think to nail this down, one needs to assess the pros and cons of attending a large vs. a small school. That’s it in a nutshell.
I’ll leave your finances to your good judgement, and that of your parents. We were full pay, so that’s coming from someone who actually wrote the checks.