I am looking forward to our summer camp too. I believe that it will be great. A lot of activities make the day more lovely and enjoyable.
I think a day trip to the lake would be better because we can go swimming and we can go paddling with a kayak. I believe that summer isn’t the perfect period to climb to the top of a mountain.
Also, I agree that we could have swimming lessons in the afternoon because lots of children want to go to the beach in the summer but they can’t swim and I think this is very dangerous. So these lessons could be an opportunity for them.
For lunch, you can prepare food which children love like burgers, pasta, fried potatoes and sausages.
Hope my ideas help,