Sunshine Coast Great Walk in the wet

Here’s a question for the brains trust … i was planning on walking the SCHGW loop and camping at Thilba Thalba and Ubajee this coming weekend, but latest weather forecasts suggest up to 35mm of rain on Saturday.
Questions
1 - how does the GW infrastructure hold up after a big rain event?
2 - with the confluence of numerous creeks in the area, is it prone to flooding and making the creek crossings between the two camps impassable?
Many thanks for your feedback