Mr Castle said the campaign group was preparing to voice its opposition when the application was brought before the North Yorkshire Council planning committee.
A fund of more than £4,000 has been raised by the group, with sales of a calendar featuring scenic images from the proposed solar farm site generating about £1,500.
Some of this money has been used to commission an independent consultant to assess the solar farm’s impact on the local transport network.
Bruce Bamber, director of Railton TPC Ltd, concluded in his report: “The access proposals, as they stand, present an unacceptable risk to pedestrians, cyclists, equestrians and other vulnerable highway users who currently use both Lord’s Lane and the rights of way that cross the site for a wide range of purposes.”