OVAs included with each Yuru Camp△ SEASON 3 Blu-ray/DVD volume.

Episodes:
1) The Outclub's Room
The Outclub girls take a good look at the Five Fuji Lakes and the Yamanashi area.

2) Rainy Camping
Rin dares to try her luck camping in the rain.

3) Rin and Nadeshiko Go Spring Camping at Lake Inaga
Rin and Nadeshiko indulge in springtime camping at Lake Inaga.

(Source: Crunchyroll)