Many on here are recommending this to get experience before shooting weddings. I had a couple questions for anyone who has done this. First, is it proper to just pick up the phone book and call around to some photographers and ask if you can assist, or would it be better to go directly to the studio? Will I be doing this completely free of charge? Could I keep some of my better shots for my portfolio or do they all belong to the main photographer? Thanks for any info you can give me.