Have any of you had experiences getting rerouted on Airlink due to a cancellation, or how far in advance they've been announcing their cancellations?

Wondering how much of a hassle it's likely to be if our CPT -> MQP flight is canceled, and we need to re-route CPT -> JNB -> MQP.

Our flight's scheduled on a Thursday, and it looks like those have been frequently one of the days canceled over the past few weeks.