April onwards is an awesome time of the year up there weather wise. Go up for 3-4 days IMO, it’s enough to see some of the local sights, if you’re into fishing have a look for a charter that goes to the outer part of the reef. Magnetic island is nice to go over and just chill on, not a hell of a lot to do but it’s good to just get the ferry over and sit on a beach.
The Strand is the main beach front, awesome for a morning walk and a few pubs along there. I used to love walking up Castle Hill (the big red rock in the middle of the city). There’s plenty of tracks but for a first timer just walk up the road. There is some awesome ‘wildlife’ that takes the road up in the mornings and afternoon.........
Stay on Palmer St, there’s heaps of accommodation there and you’ll be within walking distance of the new stadium. Look at the Oaks Gateway or Rydges, if you book now it’s ridiculously cheap.
Heaps of places to eat on Palmer as well, there’s an amazing indian place called Masala’s at the end of Palmer that all my visiting mates used to make me take them to when I lived up there. There’s a joint in the city called ‘Betty Blue and the Lemon Tart’, their breakfast is humongous, refer to the below pic
The main nightclub area is Flinders Street East and literally over the water from Palmer St, I haven’t been out in years up there, so I can’t really give any advice on where to go out. Mad Cow is an infamous joint that plays corny 80’s and 90’s shit, $20 you’ll end up there late at night.
Hope that helps mate.