Do I need to save my crafty purchases receipts?

I don't keep any receipts. Well, I only keep home improvement receipts. Receipts for all other items, once deemed not returnable, are tossed.

But if you're so inclined and you don't have a scanner, you could take photos of them.

ETA:  fortunately I have not had to deal with HO insurance {knock on wood!}

Every so often, you could take a video of your stash, pointing out how much things cost you. Upload it to a cloud, just so it's there.

Along the same lines, take photos of expensive tools.

I actually asked my agent about this once, on renters insurance. She told me that I should have an inventory list or photos or video showing that I actually own the items, but that I would be reimbursed after I replaced them and turned in that receipt. But the inventory list and photos were the most important thing.

It had to do with having a replacement cost policy. I thought it sounded weird, too. But a number of years ago, we lost a TV in a fire at a repair shop and that's exactly how they handled it.

A few years ago I had a temp job in the claims department of a moving company and anything that was lost or damaged during the move, they had tons of resources they used to determine the value, they weren't interested in what people had paid for the item, they were interested only in what it would cost to replace it now. I would guess that insurance companies have those same sorts of resources.

It might not be the worst idea to call your agent, though. Some of us have enough invested in tools and stamps that the insurance company might want to add a special rider!