here's what i personally do.
1. hardcase is a must. if you love your instrument its always a must to invest in a hardcase. if the guitar doesnt come with a case, hiscox cases is what i buy.
2. has been my practice for years, i loosen the string tension. regardless if it has a fixed bridge or a floating bridge.
3. i dont take off the neck. for me atleast.
4. i fill up the case with foam peanuts. this will ensure zero movement of the guitar inside the case itself.
5. i wrap the case with bubble wrap. sayang din if ma dent yung case.
6. i then wrap it with a box. usually the box that came with the case or the guitar box itself.
tl;dr: wrap it like a tank.