Planning a 5 month trip from May next year to Kimberleys and NT on way back home.

Have Bridgestone 694's on at moment and more than happy with them but as they are well worn (70%) I will have to invest in new tyres for the trip.

Looking for advice from locals or recent visitors to the area on which tyre will be best for the gravel roads up there. Not interested in forging new tracks or anything that extreme but still want to get into some more remote areas. A similar question would probably be -- how long is a piece of string.

Thinking of Bridgestone 697's or BFG KO2's as all rounders.