Sounds like a type of frog, but coming from high up in the trees (there were several calling back and forth). Maybe tree frogs?
We found this frog at a lake
Gastrophryne carolinensis at 6 second mark?
Observation is of the sheep-sounding frog with the higher, more nasal sound audible at 10, 18, 20, and 29 sec.
Compare to the deeper-voiced sheepfrog, in this recording, which is broken out here: https://www.inaturalist.org/observations/210593393
I think these might be tree frogs, but I’m not sure
https://ebird.org/checklist/S170564768
audio adding
https://ebird.org/checklist/S170564768
audio adding
https://ebird.org/checklist/S170564768
audio adding
Plus Hyla chrysoscelis and Acris blanchardi