Started a 8-9lb butt last night. Put on the top rack @ 9:30pm. Went to bed last night @ 1:am with the lid temp of 300 using a thermo. from my weber gas grill stuck in one of the holes of the top vent. I also have a cheap oven thermo. hanging from the top rack. This morning @ 7:am the lid thermo read 250 oven thermo 210. Meat was @ 160. I opened the door an inch to get temps up a little. I live @ 7000ft and i'm not trusting either thermo. When should I check the butt every hour every 2 hours? Is 300 to high of a lid temp to be using? After the butt hits 190 how long can I have it in the cooler for folks are coming over @ 7pm?