Best way to match orbital inclination on interplanetary transfers?
I got into KSP about three months ago, I have about 70 hours in, and I’m finally sending interplanetary missions! I’m trying to launch a satellite/rover combo mission to Pol, and I’ve run into a problem. Namely, how to match orbital inclinations during interplanetary transfers, both to the target planet, and its moon. Jool and Kerbin are offset very slightly, so I launch slightly south at 2.7° in order to match that inclination instead of performing a mid-course correction. This works well. However, once I arrive at Jool, I am in a highly inclined orbit that takes quite a bit of dV to flatten for a Pol intercept.
I’d like to send similar missions to all moons in the Eve, Duna, and Jool systems, but manually correcting for inclination once I get there by packing more dV seems suboptimal.
The precision required to arrive at an equatorial orbit, or even a reasonably low inclination orbit, is quite difficult over a journey of millions of kilometers, even with an ion engine (which is what I am using). What is the best way to do this?