HELP Diaper Bag for toddler and baby

I’m an admitted overpacker for my 20 month old... we have family out of town I like to keep tylenol, butt cream and other necessities constantly packed... when I say out of town I mean they live hours from us and at least 30 minutes from a store #AnxiousMom lol

Now I’m worried about what diaper bag to get since I will have to pack diapers and extra clothes for this baby in the same bag. Thankfully the other necessities won’t need to be double packed lol

HELP! Light, quality big diaper bag... does it exist?

Thanks in advance for all recommendations!