Fortunately, for many years now, wheeled suitcases have been available to make life much easier. Instead of wasting your money and time purchasing new luggage every couple of trips your family goes on you should invest in some durable high quality fashion luggage.
Many cases often have leashes attached to the top corner, and were pulled along behind you. Luggage is something worth investing in. Samsonite luggage bags are known for their strength and ruggedness.
Packing light and carrying your luggage on the plane saves time and you don't have to wait for your bags or worry about losing them. From the expensive high end Ricardo luggage which has a built in digital scale, to lesser priced American Flyer luggage and many in between. Lukewarm water and a mild soap are necessary to clean the surfaces of luggage.
I would not buy luggage that does not have wheels for the simple fact that I am getting older and carrying a heavy bag is not my idea of a fun vacation. Hopefully, by lightening your load and only packing the necessities, you will have room in your suitcase for everything to fit and it won't get wrinkled.
High Sierra Luggage - learn about it Carry On Baggage Size - the basics