The canal path loop I really enjoy is from Walsall to Birmingham on the Daw End, Rushall and Birmingham Tame canals, and then home via the New Main line and Walsall arm canal. It's about 32 miles and is a fun ride. However, after consideration, there are stretches that at night might be too risky, especially that last mile into Brindley Place where the steep narrow lock side paths are.
I might switch to Cannock Chase, it's a bit more of a logistical exercise because I would need to take the van and find car parking but in terms of safety it's probably best for me.
My lights are Exposures "MaxD" and "Joystick" so I suspect that if I am not seeing something it's because I have them setup wrong or I wouldn't see it anyway. BTW - I now have a moderately impressive bruise on my arm.
Thanks for sharing experiences and I appreciate the offers for group travel, much appreciated.