Onx shows campground but national forest doesn’t

[Jeep or Tacoma]

So I’m working on my camping trip and I’m looking up a bunch of different campgrounds and I’m finding that Onyx shows a lot of them that are not listed on the national forest map specifically I’m looking at Davis campground, rhymes, campground, alder creek campground and the list goes on and on

anybody have any idea what is going on?
Are these actually campgrounds or is the Onyx map way out of date? I kinda need to know cause I don’t wanna get the end of a long day and not be able to camp anywhere?
Which kind of brings me to my next question if I’m not mistaken disperse camping is allowed in the national forest correct? This area is near Sequoia Kings Canyon national Park.

 

[Kingsize24]

I cannot say for your specific situation, but generally when I'm traveling OnX is MORE up to date than the state or national park information sites or pamphlets. That's happened 3 seperate times now to us.

 

[Jeep or Tacoma]

I think I figured it out but it’s kind of useful for a lot of people to know those campgrounds I think are primitive campgrounds so they’re not maintained by the US forest service all they are really is some may have a pit toilet most don’t have anything

Does that make any sense?

 

[Sparse Gray Hackle]

<snip>
Which kind of brings me to my next question if I’m not mistaken disperse camping is allowed in the national forest correct? This area is near Sequoia Kings Canyon national Park.

It’s worth a call or website visit. They’re probably open, but…

 

[deserteagle56]

I think I figured it out but it’s kind of useful for a lot of people to know those campgrounds I think are primitive campgrounds so they’re not maintained by the US forest service all they are really is some may have a pit toilet most don’t have anything

Does that make any sense?

^Correct!

 

[JaSAn]

So I’m working on my camping trip and I’m looking up a bunch of different campgrounds and I’m finding that Onyx shows a lot of them that are not listed on the national forest map . . .
I don’t wanna get the end of a long day and not be able to camp anywhere?
Which kind of brings me to my next question if I’m not mistaken disperse camping is allowed in the national forest correct?

What 'national forest map' are you referencing? I know nothing about Onyx.

My first source of camping in National Forests is the official Motor Vehicle Use Map. My understanding from talking to rangers is the most up to date. It will give you road and trail restrictions, mark official campgrounds and show where dispersed camping (boondocking) is allowed, as well as other restrictions. Any new or temporary changed will be noted on the NF website.

For planning I use as many sources as I can, including: Delorme and Benchmark atlas, State maps, Google earth, websites, etc.
And still sometimes I find camping spots non-existent, trashed, or otherwise not to my liking. I always have a Plan B (and C . . . ).