Agree with you both on not going straight across - I do this on my jetski (Sandgate, Redcliffe), but wouldn't on a small boat. I have hugged North Straddie and then over to Moreton before but even then, crossing the channel between Moreton and Straddie can be pretty dodgie and if you go further into the bay to avoid the channel you get back into the swell / chop on a bad day.
Anyway, choose your day yes. Maybe after I have owned my Speedster for longer I might get confidence in the boat to make such a trip, but I probably wouldn't do it with passengers now. I've read too many stories about sucking stuff into the pump and getting stranded. If that happens in the bay, chop picks up, you could get into trouble pretty quickly.
Unless we go together sometime? Always good to pair up!