Yes you can, but its better going a bit further up instead of near the front

Part of the site is, I believe, within the no fly (drones) zone of Glasgow Airport.

The trails are miles ling, it's a very open area, so no time restrictions apply, if there when dark, take a torch

The park is open 24/7. There are no gates and it has a popular car park for viewing the night sky and fabulous views over the Clyde valley.

I am not sure that camping is allowed up there. Your best bet would be to contact the ranger service or someone at Renfrewshire Council to ask. Sorry I couldn't be more helpful.

Not at the Gleniffer Braes Country Park. I'm not sure where the nearest one would be. There is the Robertson Car Park, but I'm not sure of the rules about parking there to stay overnight.

There is a place about a mile further on called the pees weep, near Lapwing lodge, I think it is still used by the scouts. I remember seeing someone catch a very large pike there when i was a wee boy. Not sure where you would get a permit though.

For the most part it is just tracks and trails with scattered sign posts but there is also extensive areas that you can explore which are off track. The terraine is quite rough and muddy in parts so ensure you wear appropriate footwear. Enjoy.