Please capitalize where necessary: great to be back on the wild camping track again. five mosquitoes, who had optimistically taken residence in the tent around midnight, lost their lives tragically- after my arrival.
A: Great to be back on the Wild Camping track again. Five mosquitoes, who had optimistically taken residence in the tent around midnight, lost their lives tragically- after my arrival.

Please capitalize where necessary: this does not prove that he was born in lassahn - only that he knew somebody in lassahn well enough for them to vouch for him.
A: This does not prove that he was born in Lassahn - only that he knew somebody in Lassahn well enough for them to vouch for him.

Please capitalize where necessary: her family was supportive; they were there for her whenever she needed them.
A: Her family was supportive; they were there for her whenever she needed them.

Please capitalize where necessary: the new work will then be performed at the awards ceremony of the axel borup-jørgensen composer’s prize in 2019.
A:
The new work will then be performed at the awards ceremony of the Axel Borup-Jørgensen Composer’s Prize in 2019.