I'm not sure how many times I'm going to have to quote this, but the Harrogate Borough Council website is unequivocal:
"Please note that parking is not allowed on any part of the Stray grassland or verges (unless in conjunction with an organised event, where parking areas will be clearly identified). On-street disc zone car parking is available around the town centre and on nearby roads". So there you go.
Apart from this, the Stray was looking like something painted by a French Impressionist this afternoon.