For the front you can pick up a set of camber bolts for around $30. There is no front camber adjustment from the factory. A slight 0.5 degrees of wiggle room maybe. However, the front camber won't change from lowering the car so you don't have to get them unless you want to.
More negative camber in the front will help with handling as will a little less camber in the rear. -1 all around is pretty safe. I personally run -1.2/3 up front and -0.8 in the rear. I would put the springs on and get an alignment to set the toe as close to 0 as possible or at least within factory spec. This will also give you an idea of what the rear camber is. The rear will gain negative camber from lowering. Depending on what those numbers are you may or may not want camber arms. I would not run with more than -2 on a DD since it will wear your tires. Toe eats tires way worse than camber but excessive camber will wear the inside shoulder. If you're going to get the arms and you know it, get them and install everything at the same time so you can get an alignment once and be done. No sense in paying twice.
I can almost guarantee that you will have more than -2 in the rear from that drop. There are some very inexpensive Dorman camber arms available on amazon that are rebranded SPC arms. They will work great and cost you ~$100 instead of the $299 you see for Skunk2 arms.
I know a lot of people say you have to wait for the springs to settle before getting an alignment. You don't. Most springs won't settle at all and if they do it's negligible. Usually its not the springs "settling" but the bushings or isolators they sit on forming to the new spring. Its one of those leftover myths like lowering back pressure in exhaust will burn your valves.....