The charity, which develops, produces and promotes creativity with learning disabled people, has spent a year working with its musicians, filmmakers, radio producers and chorus behind closed doors.
"To keep everyone making art and finding ways to share it has been a challenge," says Senior Producer David Parker.
"As well as social isolation, there are often barriers to using technology that our artists have worked very hard to overcome."
Whilst online streaming of their work has been successful, nothing beats getting together with friends and family for a live show.
A Lark In The Park brings many of Carousel's artists centre stage in a safe environment.
Bands include long-standing pop combo Beat Express, solo artist Dima Zouchinski and acoustic trio The Black Bawlerz.
Also on the bill are films from Oska Bright Film Festival and a live-radio piece from the Lovie Award winning Carousel Radio team.
Those who arrive early can test-drive a geo-location audio tour of the park with the Carousel Chorus.
The venue, in Dyke Road Park, is operating on a reduced capacity this season to ensure everyone is properly spaced, and full Covid-19 measures are in place to safeguard the audience and performers.
"It will be a fun night under the stars," says compere Jason Eade.
"I can't wait to welcome everyone to BOAT."
A Lark In The Park at Brighton Open Air Theatre, Dyke Road Park, Hove, on Thursday 20 May 2021 at 8pm (doors 7.30pm). Tickets on sale now: £7.50 (carer free) from www.brightonopenairtheatre.co.uk