There are a few places in the north, up from Sarajevo.
If you can get flights there then the accommodation deals look quite good. you could look at these websites
http://tinyurl.com/26ajul
www.bhtourism.ba/eng
Also you could consider Poland - Zakopane isn't far from Krakow and there are now quite a few cheap flights there from the UK. A friend has told me it is amazing...