What skills pay the most for a few hours work

Seriously none, any job where you are going to have to travel will normally be longer hours, Writing, if you can write for publications may allow travel. Many engineering jobs in bio, mechanical, or ocean engineering.

So, you want to work a little and get paid a lot?

Well I can think of one job that does this ;)
Seamstress...

Yeah, in a sweatshop. Pay is next to nothing and work like a dog.

No the OTHER sort ;)

Ahhhh!! Little slow on the uptake here.

Airline pilot is the closest I can think of.
But any high paying job loses it's 'hourly' status and becomes salaried, meaning you work for a yearly amount and get the job done, no matter how many hours it takes.
Such as Secretary of State (lots of travel, LOL)
Commercial ventures that require a special knowledge and travel:
Geologist in oil and gas exploration
Structural engineer with earthquake specialty
Multi-national corporate liaison fluent in several languages

Of course the highest paying one is CEO of your own company. IF you take the risks to get there.

The trouble is that people who ask this question rarely get to any of these jobs because you have to care about the type of work first, and the pay second.