Really sorry to hear your news, that is quite a big loss. Keep a super close eye on everything - all your poultry- any sign of hunching up, bring in. Personally I would try to leave off the infected ground as long as you possibly can, especially with younger birds.
You'll catch it in time if it happens again. Things like this, you never really understand properly until you've been through it. Now you know the signs and how it rears its ugly head so you're one up for the future.
I would keep your young turkeys in for as long as possible btw and when you let them out again, choose a nice sunny period.