A stop somewhere along the Sydney/Canberra train line and a picnic sounds like a fine idea to me.
My only blackout dates are from this Fri to next Sat, whereby I will be holidaying in New Zealand, South Island with my lovely wife.
Don't worry, I haven't gone all spendy all of a sudden. We'll be mustachian holidaying, meaning taking cheap Jetstar flights ($300 return each!), driving/sleeping/eating in a budget campervan, some freedom (as they call it in NZ) camping and a DIY itinerary involving lots of free hiking and sightseeing.
Looking forward to both the holiday and the suggested meetup!