Next year, get a thermometer. That's the only way to go. There's a really cool electronic one made by Polder which can be read without opening the oven, but any thermometer is the thing.
Covering with and basting thru cheesecloth is not a bad idea, but I would not do that while the oven is over 375.
As mentioned earlier, I am an advocate of a short shot (half hour) at 425/450, then dropping to 325.
I don't time zone you're in, but you better get that bird in the oven. ;)