Of course, in the 90s there was a mass celebration of fishermen on the reservoirs in March-April. Some slept on the ice instead of fishing. Back then, firms and organizations could afford to organize this kind of vacation for their employees, and fishermen in large groups on buses came to ice-covered reservoirs. There is no such thing now. In any case, I do not see such organized trips of fishermen to the reservoirs, everyone gets himself on his transport. But ice fishing is very popular among fishermen.