Dave,
A couple quick notes:
There are actually 2 D&RGW 6300 series flats in existance: 6302 & 6314. See Bill White's web page at:
[www.orci.com]/
For info on the D&RGW cars at Ft. Lupton, see my page at:
[users.ev1.net]
And, since you have included RGS cabeese on your page, I have heard that RGS #0409 is at the Tokyo Disneyland. I have never been able to confirm that, though. Darn it! I do know that they have a narrow gauge railroad there and that they have a caboose, but I just can't confirm that it really is RGS #0409.
Michael