Best place by far is the Southside as the view from the AVP is not as good as it was due to building work.
Park in Moss Lane then enter the Country Park by a gate across the road walk around 10 mins and then go up the bank where views are brilliant,
You can also park the other end of the park off the Wilmslow Rd by the hotel but the parking is limited,
Southside is free whilst the AVP is a bit of a rip off.