Hi,
if you like very aromatic blue cheese, try Ashgrove cheeses just out of Latrobe.
They also have a good range of 'normal' cheese.
Burnie has an outlet for Lactos cheese, again a good range including some with a bit of 'bite'.
Bruny Island also has a good boutique cheese outlet about 15 minutes from the ferry - thoroughly recommend their range, my favorite from there is a Tom cheese, made in the French tradition.
Dunally has a good outlet for crayfish on the water front on the Western side of the canal just past where you would cross the swing bridge heading towards Port Arthur.
Oatlands has a windmill, and just near that, but on the Main Rd is a bakery that sells my favorite breads - a spelt loaf, or a malt loaf. They are a small loaf, but solid. Slice them thinly, because they are substantial.
The Big Red Cherry Shed is beside the Highway as you leave Devonport heading East - good value.
Rasberry farm on your left as you approach Deloraine heading towards Launceston, again good value and excellent product.
cheers