Prices aren't too bad, a bit more than what I usually pay (about $250 per night), though the places I stay at are usuall owned by people who just rent it out as a holiday house, which is cheaper, and they give all the amenities, linen, towels etc as usual, plus they have a kitchen and fridge, microwave, oven, etc so you can cook also if you wish, I like to cook breakky so I can eat in my pyjamas.
Look up the surrounding areas, especially St. Helens, that's where I usually stay and it's literally 2 minutes drive to Binalong beach.
Oh did I mention you'll get to see a heap of native Australian animals, but watch out for the road kill.
Even at the bushy camping ground near the beach there's be wallabies jumping around and wombats.
Also Spirit of Tasmania will drop you guys off at devonport which is about an hour from launceston (one of the major cities in Tas), spend a night there, visit cataract gorge (Google it also), go for a swim at the pools at the gorge, go for a walk around the gorge and find free roaming peacocks..
Tasmania is an awesome place and I'm going back in January!