Chris Davies is also ordered to complete 50 hours of unpaid work.
Scotland, Wales and Northern Ireland have their hottest Easter Sunday, with England just shy of its record.
Dyfed-Powys Police says the parties frighten people, harm wildlife and damage the environment.
Cardiff Blues head coach John Mulvihill says Gareth Anscombe will be involved against his future region Ospreys in Saturday's vital Judgement Day fixture in the Pro14.
Wales stars Alun Wyn Jones and George North could return for Ospreys in Saturday's crucial Pro14 match against Cardiff Blues.
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