Long range weather forcasts is what you'll be watching and generally up to 15 knts is great and crossing the gulf shouldn't be problem for you, once it gets up to 25 knts it becomes a slower trip, even in a 23 footer.
One of the legal requirements is to have Admiralty charts for these sorts of adventures, study them for reefs, sand bars and any low water areas and plot your journey.
Then you need to know were you can anchor in protected water if the wind picks up too much for safe passage, Edithburgh, Marion Bay, behind Haysack Is, Althorpe Is, Pondalowie Bay and Wedge itself. The waters from Marion Bay past Althorpe Is can really stand up with the currents and winds.
Then were you can get supplies from if needed, like Edithburgh and Marion Bay.
Reliability of your cruiser and servicing is to be considered
Fuel range of your boat.
Log on to the coastguard with your VHF radio.
These are just some basics I can think of and all things concidered, you should have a good trip and doing the short runs would be fun.
What sort of 23 footer do you have.