Mum travelling with two kids confused by RMT strike on 1st Sept Saturday morning: journey from Whitton, via Staines and Reading to Newton Abbot

I am travelling on the morning of Sat 1st Sept from Whitton, changing at Staines to Reading then on to Newton Abbot. I'm finding it difficult to work out what disruption there might be using the website. I have two small children and want to plan ahead as much as possible. Any help in working out which trains are running and where there might be a bus replacement would be appreciated