I don't know your time zone, so 2:30 means nothing to me. In general, you're looking at about five hours.
I would not turn the temp back up. A short hot blast, then a long slow cook is my preference. Covering with cheesecloth and basting is fine. Let stand for 1/2 hour before carving.
I do have a meat thermometer, but there seems to be different opinions about what temp the thigh meat should be.
First, you want the thermom in the thickest part -- that is typically between the thigh and the breast. You want it in, not just on the surface.
I would go with at least 160. I'd probably go 170. But no more than that.
Someone else recommended 140. That seems awfully low to me.