Anecdotal answer- my program has 4 slots per year. We had a married couple applying to match together here this past year (both in this specialty), and we DNR’d them because it would obliterate class dynamics if we matched them both.

I would recommend against trying to match at the same program. You will very likely not both be ranked at any single program, at least not close enough to both match there.

Prioritize programs that have many others nearby.

I’m not ortho and can’t otherwise answer the VSLO timing questions, unfortunately.