Think it will depend on what airline you go with, am off to Fiji in three weeks and was trying hard to get mine on but Pacific Blue will only accept up to 3 metres in length as baggage. After that you have to send as airfreight. So at 10'8 I am about one foot too big. (Thats what all the girls tell me anyway

). As far as weight goes, think most work to the rule you are allowed 20kgs and a board bag will count towards 5kgs of your 20kgs allotment regardless of the weight.
Reckon there would be endless opportunities as to where, I am hoping to get there next year and go for Dreamlands on a big day.