Go to your regular spots you have hunted, they might be sitting tight need to stomp on brush, work along creeks, look for them sitting in clumps of grass, next to trees.
Don’t wait for the afternoon get out in the morning look for tracks, the snow has to be frozen for a few days to cause a problem with the dogs pads getting cut. If the snow is soft expect it to fall back into the tracks, if you have to many dogs it can be Cluster trying to run. Might have to only use 1 maybe 2 dogs because of the hard running. Might have short runs do to the snow. If you know of holes go them first and fill in with snow so rabbit has less of an escape route. The rabbits will run nice circle just like on bare ground, your dogs if not use to snow will have hard time running, the rabbits should have the advantage. Might have more checks, or maybe not should be a great experience if you have never run in snow. JMO
Have fun, let us know how you do, Get a video of the hunt.