I ended up calling the turn, and donking the river (low heart), but looking back on it, yeah, check-calling was better as A-high and weak pairs probably aren't calling on that board.

I don't think a flop CR is correct, the best part of the check-call is my relative position to the raiser going to the turn.

I'm still trying to figure out if there are any river cards which might change my equity drastically enough to make this a fold on the river (given that I called the turn T). Maybe a 9 or a Q?

As it turned out, the BB called my donk-bet and we chopped. He had A8o.