What are my chances at Stanford? EA and RD.

You should check out the rules on URM status. I believe that entitles you to list yourself as hispanic/latino, especially if you have identified yourself with that group in the past.

http://www.top-law-schools.com/urm-applicant-faq.html

Checking off both white and latino is not dishonest. Stanford gets a fair number of latino applicants, but it certainly won’t hurt, and may help some. If you have any doubt, call the Stanford admissions office.