No, not unless one of the children is under age 3 and can sleep in a pack+play. Most of the WL rooms only sleep 4 + 1 child in a pack+play.
WL does have some 'Deluxe" rooms which sleep 6...but they cost quite a bit more and are harder to get discount codes for. If you have your heart set on WL, it might be cheaper to get 2 standard rooms.
Sharon K