Take everything but tanks and weights. I'm not really sure what the big deal is. I can get just about all of my gear into a standard carry on. I took a lesson from what they do with the dive caddy and created some compression straps for the gear and cinched everthing down. I was able to fit my Zeagle Ranger, twin jet fins, mask, boots and regulator in the carry on by packaging it carefully. The only dive related things that went in the suitcase were knife, shears and sunscreen.