BBC News
Published
"No party is worth the risk", is the warning from the Welsh Ambulance Service.
It described New Year's Eve as "one of its pinch points", and asked people to celebrate at home during Wales' coronavirus lockdown.
Concern was also raised about people visiting beauty spots or attending organised raves.
Denbighshire councillor Martyn Holland said rangers will deter people making a "pilgrimage" to one peak.
"The number of visitors over the last few days has also raised potential concerns about New Year's Eve when traditionally many people head for the top of Moel Famau to see in the new year," he said.