Hello and welcome to the R.T.A. forums !

Does anyone have any hint or tips? Or know any sites that help you plan your trip without them booking it all for you?!
What sort of stuff do you need to know ? Firstly I would do some research, find the stuff in America that appeals to you, find out where they are on the map and start adding the dots to it and the best way to join them up.
You will certainly find thousands of ideas throughout the forums and road trip planning pages by searching key words and using the tags.
Once you have done some research, we can help you put your trip together the way you want it to be, but you need to do the "leg work" first to enable us to help you. Planning is a very enjoyable part of the trip as a whole, so get started and find the places that you want to see and keep asking questions as you go.