I always walk...stand bag on my back and sometimes a cartbag...on a cart.
I only use a buggy when it's very hot...rather rare overhere.

Ball marker...I use the "button type" on my glove.
Tees and pitchfork...tugged in my hose.
Extra balls in my bag or clipped on my cart...always close by.

A small belt-pouch can be handy...wear it on your back.