I think one issue that needs to be taken into consideration is how remote of a location will you be visiting. I personally want to have all my gear with me because you may not be able to find a replacement and I am not comfortable with using rental gear etc. With the limitations on weight for luggage etc., you have to be careful. When traveling to Galapagos, you are allowed ONLY one checked and one carry-on. That means all your clothes and dive gear would have to fit into those two pieces of luggage. Since going there, I learned how to pack efficiently
When the number of pieces of luggage is not an issue it is obviously easier, so I always take all my gear and a few redundancies like masks, extra computer, regs, etc. I would hate to have to not dive or miss a dive to equipment malfunction despite taking really good care of my gear, especially after paying sometimes a lot of money for a dive trip. I pack all my gear into a pelican box. I like the hard sided boxes so the gear is assured not to be damaged. I pack my fins, BC, wetsuits, masks, booties, repair kit for various equipment, extra hoses, dry bag etc. in the pelican box. I always carry on all dive computers, regulators, and dive lights in my carry-on. Since they are fairly heavy, it helps with the weight restriction for the checked bag. The carry-on I use is a roll aboard that I can strap to my back like a back pack so I have two free hands. This helps when toting everything.