Converting from RSTP/WDS mesh to HMWP mesh?

I have a few neighborhoods that have been running with RSTP/WDS mesh for about 5-6 years and I would like to convert these over to HMWP mesh. What would be the least disruptive/painless way to move from RSTP to HMWP? I know that RSTP can be finicky if you start changing settings on radios and I really don’t want the whole mesh network to go down when I start changing things.

Any help and or suggestions would be appreciated.

Thanks,
Chadd

Anybody??