This is a Sunday brunch with the guys or family outfit! I feel like you don't have to wear dress pant to wear a blazer with a dress shirt. Just throw on some plain, simple jeans and add on that beige blazer with a neutral color dress shirt.
Here is a quick visual of all the different types of bags. Plenty of choices categorized by style, size, and utility potential. I personally prefer a messenger bag, suitcase, or a traditional backpack!