The camp director and camp guides must have a laptop or Chromebook. They cannot lead the program with only a tablet or smartphone.
Each camper needs a device with Internet access. If you have a laptop or Chromebook, you will have an easier time typing and participating compared to if you only have a smartphone. But a smartphone will work, in a pinch. Whatever device you use, it needs to have a camera and microphone so that campers can participate in Zoom video conferencing. It also needs to have a strong Internet connection.