Yeah with about a 2" drop you really shouldn't need a camber kit. Whatever shop you take it to, ask them for a print out of the before AND after alignment specs. Any shop should be able to provide the information to you with no problems. This way you know for sure the alignment is good. Hell I just went to my local Honda dealer and got a free alignment check the other day(I do this often to double check my home alignment on my race car). Some places have alignment skid plates you just drive over and it reads your toe, a lot of places will do it for free...
Also, if you want to ensure your front and rear toe does not easily slide out of alignment, double check and tighten the bolts/nuts to spec once you get the car back from the shop.
It might not be a bad idea for you to inspect your suspension components, mainly your bushings, to rule out they aren't what's causing the wear. I'd start with looking at the trailing arm bushings since those tend to tear and crack after time.