Replacing transmission hoses???

I have the smoke screen effect going on and cant pinpoint the leak. I dont think its the power steering hose because this has been going on for a while and I dont need any p/s fluid. So i'm thinking its a trans hose. I have also noticed that my tranny fluid is really low. I have never looked and was wondering how many tranny hoses their are and if they are hard to replace? Will I be better off just taking it in to Subaru and let them find and replace the problem?