Had a pack basket for many years, then I used one of my kids old backpacks, now use a cabelas 36 inch rod holder bag.
It hold 3 laker rods and 3 big tip ups. My buddy has 2, one for his traps and one for his rods and he uses big heritage laker traps too.
Not sure if this are the 36 inch heritage, I know his rod bag is sized for 36 inches.
Traps are much more robust to stand the abuse of ice fishing more so than rods. I break at least 2 rods a season by me being an idiot and lazy. My traps I can just throw in my sled and deal with them at home.