I have assumed the OP implies participation.

Upton upon Severn is a smallish festival with loadsa Morris, 2 ceilidhs and a singaround in the Muggery pub. Plus ad hoc ceilidhs under the bridge. Early May Bank Holiday

Chippenham is right in the middle of Hrothgar's window and has everything requested. See you there - I will most likely be in the information cabin, at the ceilidhs and in the Old Road Tavern which is a session, the song is more likely to be in the Bear Hotel.

Tredegar House Festival is mid May in Newport, Wales. It had 2 ceilidhs and plenty of singing last time I was there. The house proper was built from the proceeds of piracy!