They'll be fine until they're 6 months or so old. Then you'll know if they're overbreeding. And, things might ramp up further come springtime when it's breeding season in earnest.
But some folks do fine with pairs, so it's hard to say!
Doggone those pesky penises sometimes
YAY!!! Congrats! You think s/he's cute now, wait til the fluffing-up! And look out... the chocolates in my flock seem to be very loud about expressing their opinions. You may have just met your new boss ;-)
Hopefully everyone else will hatch effortlessly - so far so good!
What's your humidity? No Sweedies or woodies, I promise. Ducklings take their sweet time. get out of the house! Your setup looks fantastic, my goodness look at all that lovely open land. What sort of turkeys are you raising?