My rationale for risking this attempt is that even if i do spook the buck, he would have been off of this pattern by the end of next week
Sounds like you already spooked him - so his pattern may already change
I agree with gobbler - I would not worry about the mowing, the fact that he winded you is more of a concern.
I would give him another try now - but not from the same tree - and not from the same exact area.