Hi Misspony! Welcome
OUr best friends got married at the Church at Port Arthur a few years ago and it was awesome and beautiful.
It was one of out choices when we were trying to decide where to get married.
I love the idea that it's a church but not a church at the same time - I love church weddings, but I don't think I could bring myself to get married in a church as I would feel like a hypocrite as I am not religious.
There are quite a lot f good venues in Hobart, but keep in mind that it is a good 1 - 1 1/2 hour trip from Hobart to Port Arthur, that is quite a distance when you factor in the time that will be spent getting photos etc - because you will HAVE to have photos at Port Arthur!
Our friends had their reception at the Cascades Colonial Accommodation - they have the old mess hall which you can hire and they just got a caterer to do a spit roast.
There is also the Stewarts Bay Lodge, which I have heard is a really nice venue for a wedding reception. They are right on the water too.
I'm sure the others can help you with venues in Hobart, unfortunately I can't as we are getting married at Eaglehawk Neck and didn't look at any venues in town.
Good luck with your planning