Can anyone give all info on mlb open tryouts they have gone to and answer me this...?

i dont wanna waste money traveling if its nah worth it so can you tell me a good size of weight on a majorleaguer so i kno to gain or lose before i go also tell me if u went to one and what happened or if u went to one in 08 and what happened.....what did they make u do? how long did it take ?how fast was the pitches ? how many people were there? and give me a 1--100% of how many people were really bad and droppin fly or couldnt throw into the infield ...also include the best position to tryout for thank you ....i like long answers or storys if u have gone