A: Good question, Neils.
I would start with the Manfrotto 7301 tripod kit, which has a folded length of 20.1 inches.
This would be the sturdiest aluminum option with a pan arm on the tripod head.
The Vortex High Country tripod is 18.8 inches folded but has a ball head without a pan arm:
Here's the Compact Gizto kit, at 21.3 inches without the head.
The price goes up on the carbon fiber tripods, but they are lighter weight and stronger.