I haven't seen a hedgehog around our cottage for years either. Used to get them coming to feed on cat food in the outside loo (now no longer there - neither loo nor hedgehogs!), when one of our cats had kittens years ago.
I'm wondering about the best way to attract them without attracting rats which are plentiful round here! We also use slug pellets in the garden for the veg, (I know I know...) so maybe not such a good idea to try to attract them (hogs) as they may eat the slugs?
Our garden/yard/orchard are also completely open access from the road and through to the fields so no problem there. Maybe we have them (hogs) in the orchard and they don't need to come down further to the cottage but would be good to see them though if so?!
Hurdity x