If you would use a macro to reset your camera, then there's no real reason not to do it with a slot swap macro, assuming camera settings have the same console commands in classic as retail.
I use slot swap macros to set my camera to normal (Only horizontal when moving) for the slot I'm in and follow (Always adjust camera) in my other 4 slots. MiRai has a good video on the basics of slot swap macros with their pros and cons, don't have the link off hand though.
/console cameraSmoothStyle 1 < Horizontal when moving
/console cameraSmoothStyle 2 < Always