OK. You'll be hard-pressed to fit all that on 2 shelves in the #1. When I do a rack of spares, I have to cut them in half and use 2 shelves. The butt is going to take its own shelf. At best, you'll fit the butt and 1/2 rack in there.
The butt should take around 9 hours (@ 225, unwrapped the whole time). The ribs take about 5 1/2 hours unwrapped @ 225. The butt will probably "stall" around 160-170 degrees internal; just ride it out. The stall is what happens when the fat and connective tissues break down, and the meat experiences "convective cooling," just like we do when we sweat. The heat will dissipate in the meat, and it will hold the same temp for a long time (sometimes several hours). Keep it in until it reaches 200-degrees, then remove and foil wrap to rest. Put it in a cooler with a big towel over it, and let it rest for at least 30 minutes. A lot of folks rest 'em for an hour or two, but you'll find the meat to be very moist and tender after 30 minutes.
Didn't mean to tell you how to build a watch when you just wanted to know what time it is, but "how long will it take?" usually is more complicated than just saying how long. ???