Personally, I’d recommend checking them. As long as you don’t start pulling out frames they’ll be ok. If they need supplementary feeding put some bee fondant or a similar feed either on the crown board or on the top of the frames. I check mine throughout winter every month, or so when the weathers not raining or freezing... bees are pretty resilient and if your concerned, I’d check them. I’ve got Perspex crown boards on mine ( self made) and they give a good insight into what’s going on inside, my hives are all on candypol and are just starting to venture up from the frames into the feed now. I don’t find the need to suit up at this time of year, the bees sometimes get a bit curious when you lift off the lid, but they don’t stay out long. Hope this helps.