Rhoneymeade Arboretum: They have received approval for the artist's pass which will provide you with greater access to the grounds. For insurance purposes, they have to have a staff member on the premises. Currently it looks as though the available days (in addition to Sunday afternoons) will be Wednesdays, Fridays and Saturdays. To sign up you will need to contact James Lesher directly (firstname.lastname@example.org). He will need your contact information should they have to close on a particular day for some unanticipated reason.
The pass will cost $20 for the season.