People are generally not so ignorant as we're inclined to give them credit for, there may or may not be some denial if they've picked up on anything. You think they'll be opposed?
That'll do it. Country folks no matter the country seem to be a little slower on the uptake where anything queer is concerned - doubly so if they're invested in an Orthodox religious community. Best of luck to you.
Maybe try sounding them out via someone else in the family that you can trust. Cousins, Aunts, Uncles, etc. might already know or be able to help you get a better read?