Agreed, you can do it with just 4 needles. But, be sure to mark your 1st stitch with a marker or you'll be very lost till things take shape.
I suggest CO1 to 1st needle, CO1 to 2nd needle, CO2 to 3rd needle.
Place a stitch marker. A small looop of different colored yarn is probably best as it will be very pliable during these first few tight rows.
Then use your 4th needle to join and start following the pattern.