A breaker bar (pipe) is useful if your car is old and the bolts are hard to loosen.

Also, you probably already know this but just in case, never get under a car that isn't supported by at least two jack stands and the jack. I've had jacks and jack stands tip over before.

I think the camber will be fine since the prokits only drop about 1".

I remember using a vise grip somewhere in the installation of my springs, but I don't recall where. Doesn't hurt to keep one handy.

Good luck!