Awsome info AdR, thank you so much. Yes we do love the beach but I do think instead of commuting another 40 mins daily, we'd better do this whenever we go to the beach. That is if really the temps are not that different, cause I saw last year they had a 5C max difference. I think that's a good move. Yeppoon may also be a little too much of a retirement village. It's close enough (and no traffic) so you can get up to the beach on a Saturday morning for a swim/surf and be back for lunch.
I think you get used to the weather wherever you are, and no it's not that different, Rocky can be a bit more 'baking' without a breeze, whereas Yeppoon usually gets the offshore breeze.
I'll look into the schools you proposed. I'd suggest having a look at http://www.myschool.edu.au - has statistics on all schools, so you can judge based on what's important to you (academic results, teacher student ratio, etc) rather than random people's opinions
Is Yeppoon really noticeably more exp.? The only difference would be house/rent prices. http://www.realestate.com.au is the biggest real estate website in Australia so will tell you all you need to know. The 'wealthier' suburbs in Rockhampton are Rockyview, Glenlee, Alton Downs, Lammermoor and Gracemere. The lower socio suburbs are Depot Hill and Berseker.