Please OP I urge you before you get too attached to having your bar back (unless you hate change) to spend some time with the browser and learn the new features. I, like you, always had a favourites bar active with folders containing many sites. It was a must for me. However...
The new Safari does things differently. Any time you click in the address/search bar your favourites appear right in front of you. Any time you bring up a new tab, by default your favourites are all there left untouched. I instantly fell in love with this new feature as it saves on browser real estate and there is truly no need for a favourites bar when I can access them that way anyway. Makes me wish it was always done that way.
Course, if you really don't like the change, that's why Apple did include the option to bring it back.