[GAME] Using wifi in a wild environment

Hi,

I'm not sure if it's the right place to post my question. Tell me if I need to go on an another sub

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CONTEXT ( Theoretical )

- Teams of players will participate at a "treasure hunt" in Battle Royal / Hunger Games style (IRL)

- Each team will be split in 2 groups: 1 front and 1 back -> the front will play the game and the back will support the front with a modelised map that contains the location of helping items, challenge during the event etc...

- The front will be gps-localised and will use an application for chatting -> the chat will be accessible for all players of all teams

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I need to find a solution for using wifi (not cellular) connection which permit the communication between front and back. I thought about satellite wifi (VSAT) but the front will need to carry a router or something else to be able to get connection

Is there any better solution ?