Ok, If you go, you should know:

• There are bears.  Food items must be locked in bear bins.
  
• Dogs are not allowed on the hiking trails.
• Mosiquitos are plentiful.
• Camp sites are first-come-first-served.  Try arriving on Tuesday.  It worked for me.
• The Kings River is fast and dangerous.  Bring a wading staff, but generally stay out of the water.
• It will cost $20 to enter the park - plus $18/night to camp.

I suggest the following flies - small - #16 is the biggest size I caught with:

• Air-Head (killed 'em)
  
• Elk Hair Caddis (worked on Browns mostly)
• Messy Bessy (killed 'em) - Tying instructions on this site
• Pheasant Tail Flash-back nymph
• Bead-headed Copper John (green)
• Midge nymphs (black and white killed 'em)