In reply to Venture2099:
The popular Kredarici Dom is a bit of a monstrosity whereas we stayed in the Stanicev Dom which is a little more picturesque and cosier. If you want loud parties and boozing head for the Kredarici though.
Where are you starting from? there are pros and cons to different routes.
As for the ferratta gear, if you're happy on grade three scrambles then I wouldn't worry but otherwise take one, especially if you're carrying a fair bit of gear or are tired from doing it in one day.
It can have a bit of a Snowdon atmosphere with hundreds of people on the summit but I'm sure you'll have a great time.