Yes. You have three options:
Add Info Point Extenders for a seamless WiFi network. Outdoors, Extenders can be up to 1km apart and also increase the visitor capacity for high traffic areas. This technology is the best solution for complex spaces such as underground rooms or multiple buildings in an open air museum.
Use multiple Info Points to create individual ‘hot spots’. Users only need to connect to the first Info Point they encounter. Their device will automatically reconnect at each hot spot. This technique is best for big open spaces, such as parks and gardens, with specific ‘highlight’ locations. Each Info Point can contain the same information; so that everything is available everywhere, or different information; so that visitors have to be at a specific location to access specific content.
Make some content downloadable so it can be used out of range. Nearly all mobile devices will download and display PDFs, which can be used for trails and treasure hunts outside the WiFi coverage area. Create a downloads section on your Info Point that can only be accessed by users in range.