Yeah the Return to Dream Land tunes are pretty obvious. The general rule is that the songs using classic Kirby instrument samples are Ishikawa and those using, as you say, "digital orchestra" and more modern production standards are Ando.
I have wholly different song titles to you, but here goes nothing.
I'm almost 100% confident, as I was 99% correct when the Triple Deluxe OST revealed those credits as well (I only misidentified the disc channel jingle, for goodness sakes
)