I thought it would be better if could put them in the suit case. I figure if it would not be much water, since i have order many shrimps before and the amount of water that is in the breather bags is not much. I thought it would be possible.
I'm not sure a sphere of "unknown" liquid packed into a suitcase on a passenger plane running through an overly paranoid system with x-ray machines is the best way to get them home. That bag most likely will at least be opened and inspected.
Mail them Priority Hold for Pickup to yourself the day you leave. The package should arrive quickly -- but if you are delayed, you won't have to worry that it's getting tossed from truck to truck or left to endure the elements at your doorstep.