IMO, the best way to kill the turkeys...
Bard:
120 Music, 120 Provo, 100+ Disco (I'm still training disco, and refuse to use illegal methods). 120 Animal Lore is a plus, for tracking their damage levels.
Get two or more turkeys together (as far from a server line as possible - the effects of the lines are BAD - not to mention all credit for the fight is lost to that point is lost every time a monster crosses a line); disco the turkeys (if one of them is already hurt from another fight, only disco the unhurt ones, until they all have about the same health, THEN disco all of them).
Stand back 8+ steps away (or move back that way after the provo step).
Provo the turkeys on each other; if more than 2 turkeys, always provo the weakest ones onto the healthiest, switching their targets as needed when the previous target health drops below the others. Be sure to initially provo each one of them, onto EVERY OTHER turkey in the fight; this makes it to where they damage each other with their area effect attacks.
If done properly, the last two fighting, if you don't add fresh turkeys to the fight, will be both below 1000 HP eventually. Attack the stronger of the two (constantly checking their health and switching as needed) with Mind blast (discoed, their weakest resist is 15-25% cold, and Mind blast is one of the few non-summons Offensive mage spells that doesn't require Eval), until one drops. Finish off the last one with mind blast or a 100% cold bow (or summons, if you feel suicidal). Try to loot the bodies - if a multi-turkey (3+) fight, when one drops, if the others aren't all near death, try to get them to move away from the corpse, then get them to lose aggro on you (quick invis and reappear), to go back and loot. They give lots of feathers (+10% more if you already have a Harvester's Blade), and may have the plucked turkey as corpse loot (according to last year - all mine were either pack drops or from nests).
Don't get your brush until it's time to do the maps (it's a 3-hour timed item, IIRC).
All the maps are in fixed locations, so if you don't have a set of runes yet, mark each place as you go - you'll need the stops again, eventually.
If possible, locate the nearest wandering giant turkey to the nest site, in case you pop a giant turkey from one of the eggs (can't remember if the "hatched" turkeys are aggro).
Keep the turkey feathers from the nest handy - they are vastly superior to invis potions, and may save your life if a turkey aggros you.
Other than that, and the gold, the big ticket items are plucked turkeys (for Harvester's Blades). Everything else is deco. I've got so many of the Cornucopeas left from last year that I've taken to just dropping the new ones by the nests.