The lack of snow cover does worry me here, as well as the fluctuations in temperatures. We should be looking toward spring now, but I fear snow in May based on our lack of normal winter this year. Hopefully your seedlings do well. Mine too.
Sometimes to keep trying different pollen can be worthwhile. Just when I think I have given up on any pollen taking, I'll get surprised. So don't give up, unless it's known to be futile.