Hi, we have 3 weeks in Australia (first time there) coming up very quickly and would like suggestions on how many nights to spend in each area. Late April to mid-May. Flying into Sydney and have 14 nights (plus 2 in Sydney at end of trip) to plan. Want to see Port Douglas area, Gold and Sunshine Coast and Whitsundays. Would fly between destinations and rent cars while there. Want to snorkel a couple days and see the general areas. Need to book flights to Cairns, Brisbane and Whitsundays so looking for advice on how many days in each. Thanks!