There are a number of 19th C. camp meeting songs, some in Negro dialect, that I have been meaning to post.
(I will post them in full in another thread).

These camp meetings, some held for and orby Blacks, were commom across the country. These meetings and songs could have had an influence on spirituals.
Here are three (in addition to the well-known Tenting on the Old Camp Ground that have campground in the title.

We Pitch Our Tents on the Old Camp Ground, 1857
(A song by the Tribe of Jessie)

1st verse.
We'll pitch our tents on the old Campground
Few days. few days,
And give old slavery another round.
On freemen on
Old slavery's a liar and conjurer too
Few days, few days
He'll conjure me and he'll conjure you,
On freemen on.
(many verses).

We'll Gather on the Old Camp Ground, jubilee song, Fred Lyons 1884

Chorus:
Den shout, shout de jubilee,
And let your voice rebound.
I'm so glad we all are free
To gather on the old camp ground.
Yes, shout, shout de jubilee
And let your voice rebound.
I'm so glad we all are free
To gether on the old campground.

Down on de Camp Ground, 1882, Fred Lyons.
1st verse.
O some will shout den take a little rest,
Down on dde Campground;
But when I shout I shout my best,
Way down on de ole camp ground;
Ole Satan tried to make me hush,
Down on de ole camp ground.
Wid my gospel gun I run hi in de bush,
Way down in de ole camp ground.

These are in American Memory.