I have had the best luck adding during high krausen but I have also added during whirlpool with good effect. In an IPA not sure it would matter much as the flavor will be only be a hint in the background. So i would just add in the whirlpool for ease. An aside, don't know the gravity of your IPA but wouldn't make honey more than 20% of grist as you start to get mead-like alcohol flavor above this IMO.
Quick question about GABF pro-am entries. I am new to the competition scene but have noticed a few brewers in the Colorado area have won multiple Pro-Am events. I thought each AHA member brewer was only able to enter one beer into the GABF Pro-Am event. So are these brewers taking away chances for the rest of us or am I confused and can they enter several beers as long as the styles of beer are different?