i live in tassie ,
you will want a cabin for children on the spirit , as for accomadation , there is a lot of caravan parks around the state , if your looking for a caravan park as you get off the boat i recomend the Devonport Bluff one or the Ulverstone Dinosaur Park one , in which directions are u headed ?

March tends to be the warmer of the summer , and generally the winds start towards the end of the month , but not normal above 28deg , but who knows this year , but thats what it normally does .

Toursim Tasmania put out a couple of great publications and can be found online at pure tasmania & discover tasmania - there is also a childrens publication put out called tasmanian parent its a newspaper type thing found at macca's and cafe's that have a lot of tasmanian children freidnly places .

im happy to help if you have any further questions ,

Cheryle