Please excuse my ignorance. Are the pike you speak of the same pike we have here? If so, I agree with Jon about the y bones which is why my father had a personal rule that he never keep a pike unless over 20 inches or a Northern unless over 30 inches. I will agree that a "large for species" game fish often tastes stronger than a smaller (and younger) one.
However the flesh on your pike must be different than on ours. The few pike I have eaten (although as bony as Twiggy) had very white meat with a very mild flavor. Quite tasty actually. These pike came out of New York State lakes. Maybe a river pike would taste different. No idea.
My 1st post so I'd like to say "Hello" to all, and give some background on myself. I'm new to flyfishing...as you might have already guessed from my screen name. LOL. I've got a Loomis GL3 8 wt. that I plan on primarily using for bass fishing (but any pike willing to hit a fly would be welcome!). The rod is about 15 years old, but never seen the water as I quit fishing 23 years ago after moving to this area. It was purchased for a trip to Upstate NY for steelhead, but never made it there.
Late this year I picked up a custom 3 wt. to go after panfish. I'm going to need casting lessons first. I think I could still cast the 8 wt., but boy did I suck with the 3 wt. the one time I tried it.
I probably should have gone for a 4 wt. or even a 5 wt. Casting would be easier.
I'm looking forward to reading about the type of fishing you gentlemen participate in...and the methods you use.