I have what over here in .uk tend to be referred to as "combat trousers", where the side pockets are reasonably spacious (I can fit a 7" tablet in one, though it then doesn't close and I can't get anything else in there) but not sufficiently so that they swing.

The only annoying thing is finding ones where everything including the hip pocket linings are made of the same heavy material, there are too many where that lining is normal smart trouser pocket material and tear through long before the rest of the trousers are showing noticeable wear.

Combats also tend to be closer fitting than US "Cargo pants" and can even look quite smart.

Right, with a decent pair of shoes combats and a button down shirt can approximate smart casual nicely.

Admittedly, the shoes I've settled on have a deep tread and steel toe caps, but neither of those really show if you aren't looking for them :D

The pocket opening is placed where the pants are still close fit around the thigh -- I've experienced no swinging or banging of the contents.

Great. They do look very impressive. Pants are hard. (They look easy but there's actually a lot of construction.)