Colour-code dots on the map to show availability#257

The map is very useful. However it would be even better if the dots could be colour coded to show whether a camp is fully-booked, or almost fully booked, or has a reasonable number of places still available.

As well as colouring the dot, the pop-up could include the number of places available and, ideally, the number of places available by day/session.

Thank you for the idea!