I agree with Zardoz.
My grandmother's funeral was 11 years ago today, and she had it planned out several years in advance. It went smoothly, no one got upset (any more than they do under normal conditions) and attenders remarked about the beauty and even joy expressed in the service.

I don't want to be buried in my kilt, but I do want a piece of tartan to drape the coffin, similar to (but not in imitation of) the way flags cover the coffins of service members. My half-plaid would be about the right size.