Some thoughts:
Given:
1. Bag size zfw x mass of crap inside squared equals Bag RTOW. It is axiomatic that you will therefore require tundra wheels to lug the sucker.
2. Authority is proportional to the inverse of bag size. I mean how big is a licence, passport and phone?
Therefore:
3. Make a Command decision: Buy a manbag, no undercarriage. If you need to ask where to buy one you've lost SA points....
Spleener