Rich, I can give you some quick pointers to get you going. First don't be super concerned with temps, the meat will be taste good at 225 and taste good at 280 the smoker will tend to be a little hot until it seasons. The temp most affects cooking time which is different for every piece of meat anyway to some degree. Cook BBQ until it is done not to a cooking chart.
I seen in one of your other posts, you are cooking for the Super Bowl. try to fire up a small cook this weekend to feel out your pit, so you won't be stressed come Super Bowl time. Try one of the chicken or baby back recipe's on the main site. you will find WSM's are pretty user friendly, and you will get the hang of it pretty quick.
Start with Kinsford, and leave lump for when you have a few smokes under your belt. It is very consistent and will not give you any surprises. Fill the ring with unlit coals (full bag)and about 3 chunks +/- of smoke wood ( I like 6) , you can always shut your vents (top and bottom) when you are done cooking and save the unburnt coals. I live in New Hampshire as well and during winter you have to start with more lit coals than in the summer. I use about 20 lit coals in summer to a full Weber chimney on the zero degree days.
Start with all vents open, when the pit gets to 200, throw the meat on. When the temp climbs back to around 220 close the bottom vents to about 1/4 (winter). I usually end up closing 2 of the 3 bottom vents completely to maintain temps around 225. The top vent should always be open. Remember air makes the fire hotter, this means opening vents or the side door.
Follow the time guide lines to get you close, but read up on when Q is done so you pull it at the right time. You can always keep Q warm or warm it up, but it is alot harder to speed up the process if it isn't ready when your guests arrive.
Take your time and enjoy the experience.