Harvard Class of 2023 RD

Hi there, I am an international applicant. Got accepted in Harvard, Yale, Amherst and Williams.
I wanted to to know if any of them would consider providing financial aid to visit those colleges in their respective dates, bulldog for Yale for instance. Was wondering if it would be a wise decision to ask them. I would love to know what previous international applicants did.

Secondly, do we recieve the merchandise (Tshirts) from the colleges as well? And if so, after selecting one or just by being admitted?

Thank you