These camps are quite straightforward, although you will definitely want to make sure you pick the correct one as you are limited to two per season, and they cost a pretty penny in VC. You should pick the camp based on your player's position and attributes. Below you will find a list to help you out with this decision, showing what attributes each legend will increase.
Larry Bird:
+3 Shot 3pt
+3 Free Throw
+2 Medium Shot
+2 Consistency
Michael Jordan:
+5 Dunk
+5 Vertical
+3 Shoot in Traffic
+1 Speed
Hakeem Olajuwon:
+3 Low Post Offense
+3 Standing Dunk
+2 Post Fade Away
+2 Post Hook
Dennis Rodman:
+2 Steal
+2 On-Ball Defense
+2 Offensive Rebound
+2 Defensive Awareness
Bill Russell:
+3 Low Post
+3 Block
+2 Defensive Rebound
+2 Strength
John Stockton:
+2 Ball Handling
+2 Off Hand Dribbling
+2 Stamina
+2 Durability
Isiah Thomas:
+2 Layup
+2 Ball Security
+2 Quickness
+2 Shoot Off Dribble
TIP: Larry Bird and Isiah Thomas are good choices for you first season starting out to offer a steady improvement to your rookie. Again, make sure you are focusing on one particular area of your game to excel in - if you try to be an all-rounder, you are likely to be ignored over specialized players, in your first season at least.
forgot yao ming
Magic Johnson: +5 pass, +3 emotion, +2 standing layup, +2 ball handling
Forgot bill Russel
Magic Johnson: +5 pass, +3 emotion, +2 shot inside, +2 ball handling
Jerry West gives: +3 offensive awareness, +3 hands +2 hustle, and +2 close shot
Where's magic and Jerry west?
you forgot to put magic johnson...