
Colt's little M1903 pocket pistol field-strips pretty easily, no tools required. There's even a handy arrow etched on the slide showing you exactly how far back to withdraw it to take the piece down.
Elbert Searle's Savage pocket pistol is similarly simple, at least as regards field-stripping, while the H&R is a little more complex, requiring a tool like a screwdriver (although the lip of the magazine floorplate is shaped for this) to pop down on the trigger guard while you're holding your mouth just right...

The Remington, on the other hand...
"Don't try taking it apart 'til you come down here," said Gunsmith Bob over the phone, and not in a "
Ha-ha, get it? It's complicated," way, but in a "
No, really, I'm serious: don't," sort of tone.
See, what you do is you push the muzzle against something hard, causing the slide and barrel to retract a bit and then use a small screwdriver to poke and pry the slide stop out. Then you retract the slide a bit again, by itself this time, and pull forward on the barrel, using the grooved ring.
And then nothing happens. So you pull a little more while holding your mouth different, maybe with your tongue out the corner so the gun knows you're concentrating. And there's a sort of *click* but nothing else. This is the part where the NRA Manual says the slide should come off, so you say "Shannon, what am I doing wrong?" and hand him the gun. Then Shannon, who can crack walnuts without the aid of a nutcracker, tugs at the barrel a bit with no result before hucking it up in the padded jaws of a bench vise...
This is not something you want to be doing around the campfire.
"No wonder it wouldn't come apart," says Shannon, "this thing's drier than a popcorn fart," and hands it to you in two parts, frame and slide. As you examine the underside of the slide, looking at the interplay between the barrel, the moving breechblock, and the very serious-looking recoil spring, wound concentrically around the barrel and of a size and thickness more usually seen pulling screen doors to, the whole assemblage wobbling under very obvious spring tension, Shannon mutters over his shoulder "...and be careful in there, those things'll pinch up a blood blister."
So you decide to just oil it up and reassemble it without further disassembly while listening to Shannon tell about the guy who got the bolt out of his Remington 742 by prying the receiver open until it dropped out the magazine well, and then brought it in to see if it could be fixed.
I'll take it apart next time.