Diaper Bag Recommendations

EJordan
Hi all! I'm due with baby #2 at the beginning of October and I've been researching diaper bag but I'm getting myself so confused! I have a son who will be 3 when baby comes so I won't need to carry a ton for him, fingers crossed I can get him potty trained, but will still need room for some of his stuff. I am also thinking a backpack style would be the eastiest to keep up with. Do y'all have any suggestions?