Leave in conditioner probably won't do anything.

If you notice the hair seems "poofy" you can use some hair wax, pomade, or even a gel to shape and control the hair. You could probably even get a small bottle of Jojoba or Macadamia Nut Oil and spread a few drops through the hair to tame it for a week or two. Basically anything that adds a bit of weight will get it under control until it settles down.