What color is your board? Bright colors help you find the board.
It's so easy to lose a dark board. I lost an $900 nobile nhp 3d 2012, the brown one with laser print on it the first time I rode it (didnt put my name on it yet), because it is dark brown and the graphics are like camouflage. I've also lost a custom board I made where I had it stained dark brown natural wood, just impossible to spot.
On the other hand no matter how many times I crash I can always my old all white board I got for $100.
If you can see your board you can go get it.
The fact of life is . . . if you do not use a leash and have a dark board sometimes you will lose it, stuff like this happens. You have to you know weigh the consequences . . . would you rather lose a board sometimes, or lose your head. Up to you.
Also put your name and telephone number on your board. Regular people don't want a kiteboard, if they find it on the beach, even 100 miles away they will call you up and you can go get it.
The only way you lose a kiteboard for good is if you forget to put your name & number on it <--- this is advice I have to take!!
actually u should put your name & number on everything, kites, bars, boards, so much easier for that stuff to find its way back to you. If you read the lost & found here it's always the same, people find bars and boards all the time, but if there's no name on it, hard to find the owner.
I know exactly what you mean by body dragging for 10 minutes you are so low down in the water hard to see, when this happens, other kiters will see me dragging around like a doofus and point in the water, and I'm like "there it is!" and go grab it.