You can toast from frozen in less time than it takes to grill bacon - but it would take a little longer to just thaw the bread, unless you use a microwave.
Freeze a loaf in pairs of slices? Then you can hammer them (in pairs) into the toaster slot and put it on the 'barely stiffened up' setting to *just* thaw it to the perfect state for wrapping around your bacon sandwich.
I freeze thinly sliced granary loaves from a good local baker, and I generally find I can 'peel off' individual slices whenever I need to, although I do sometimes need to use a knife to split them apart. Individual slices defrost in around 20-30 minutes if you just separate them and lay them out on a plate, and 30 seconds in a toaster does the trick too. The key part of my technique is using thin-sliced brown bread which lets me split slices off while the loaf is still frozen solid - but if you can find bread like that it does save the faff of splitting it into sections before freezing.
I keep bread (from Waitrose, Sainsbury, or the baker up the road) in the fridge, and it stays as fresh as when it was bought. Why are people keepng it in the freezer?