Here's a list of translations of the terms you provided
Camilo and I / the pool
I / the cafeteria
You all / the municipal park
My cousins / the gym
You / on a hike to the mountain
And the additional sentences:
I go swimming in the pool.
You go biking through the park.
My brother and his friend go to eat at Doña Juana Café.
Camila and I go for a walk downtown.
Fernando goes to the park at four in the afternoon.
Alejandra and her classmates go to the science museum.
