Hi Lunarz, even if you think the hoggies are no longer visiting please keep putting out food & water. This time of year there are Autumn juveniles who need to gain sufficient weight in order to hibernate properly and survive. They need to be approx 650g. Some hoggies will possibly start hibernating around now but many will wake throughout the course of winter and will need to find food easily. Dry cat biscuits, chopped peanuts, sunflower hearts, mealworms etc rather than meat as this will stay fresher for longer, also ensure the watererbowl doesnt freeze over.
As Alina says, the family will no doubt have split up by now as hoggies are solitary creatures. Try leaving an area of your garden wild and provide twigs, straw etc for them and they could very well use the area to hibernate.
I currently have 3 hogboxes in my garden, 2 have had a hoggy in for the last few weeks and the 3rd will no doubt be discovered soon as it has only been in situ for a couple of days. 
On another note, if you are building a bonfire, please either build it during the day it will be lit, or ensure you can check inside before lighting as this is an attractive site for hoggies to sleep and many hoggies die each year this way 