Hi Majik
I know of a lot of smaller boats who have successfully done the trek up the Queensland coast, e.g. Compass Careel 18, Sunmaid 20, my late dad's Triton 721 whose hoomans picked their weather and took their time...citing what Disraeli advised as well.
Think you would be doing a lot of motoring in a Roberts 25 as they're kind of known as 'floating caravans'.........not my words............and no offence intended
. So factor in fuel costs. It will be slow trip!!
Have a look at some charts, Lucas guide, etc. etc. and see if the trip is something you think you would like to do. This time of year is a beaut time to do it with se/sw blowing you all the way up the coast.
The trip itself is fairly easy with the longest stretch the first from Brisbane to Wide Bay Bar. We call in for a breather at Mooloolaba then time it for tide and dawn to cross the Bar(which is what everyone does) into the Sandy Straits.........smooth water all the way up to Hervey Bay. Thence it's pretty much day hops all the way to sunny Townsville.
Just lots of factors to look at. How much time you've got? How much patience you've got for a slow trip? How much tolerance you have for each other's company? Who's gonna make the journey with you?? Got some experienced friends/family??
Do some reading up on Wide Bay Bar especially Majik. She can be beautiful..when she's asleep....and she can be positively 'orrible when she wants to be.
Get some quotes on road transport with a dedicated boat transport company. You may be pleasantly surprised.
All the best
Trace
