I decided to sort of try the Carwash Mike's method...but not exactly as described.
I got a 3-pack of baby backs at Costco yesterday. I half-prepped them last night (coated with mustard/ketchup/worcestershire mix) and wrapped them up.
Today, I got the fire going, dropped in a few chunks of apple and cherry, plate setter legs up, grid, and inverted v-rack. I sprinked the ribs with my dry rub, and put them in the egg, which had been going a little more than 30 minutes and was at about 250F. Adding the cold ribs brought it down to 220F, but I left it alone and it came back up to 250F after a while.
I misted them with 50:50 apple cider / apple cider vinegar at the 1hr and 2hr marks. I'm not using a drip pan.
I'm hoping the slightly higher heat will speed things up just a little, because I didn't get them started til around 2pm.