The correct way is to register any valuable goods with a serial number at customs (green card) before you take them out of the country. And, yes, in my experience, the customs officer requires the goods to be there and confirms the serial numbers whether on a bike, gun or whatever.

That doesn’t help the o/p. I’d suggest a) assume there will be no issue for reasons given by several posters; b) be honest and straightforward if asked; c) have any documents and photos available; d) have some proof of value; e) if the value is under your personal exemption ($700 for 48 hours) you’re home free in even the worst case.