On a normal easyJet fare, you appear to get only an "Under Seat Cabin Bag" (45 x 36 x 20 cm). From what I can tell, their website has a $22 USD "family" bundle for up to 6 "hands free" standard (56 x 45 x 25 cm) bags. EasyJet claims you can "remove" your carryon item from your standard back to bring on the flight.

There are four of us traveling, all with a backpack (45 x 36 x 20 cm) and a standard (56 x 45 x 25 cm) bag. We should be able to purchase a $22 USD "family" bundle to be able to check all four of our bags, while still bringing our backpacks on board, correct? We will not have to show that our backpacks can fit inside our standard bags?

Follow-up question, what if we have a layover? Is the bag checked through to our final destination? Or do we have to pay for "hands free" twice?