NNG Steam Excursions on the Southern Pacific Info needed

Have film clips of various SP Steam excursions in the 50's and some have little or no info.

Here is a list of the engines that have no dates.

1806 & 2366 doubleheader(only one scene)
2475 Trip through Niles Canyon...I think John West has this??
2728 with SDP 5363 on some branch line
4274...probably last run over Donner
4229&4247, plus later 1451 Lakeview excursion(I think it was 2 days)
4460 To Davis, then 1744 meets it there.
2248 in old garb...in steam but not moving.
4460 Could be Oct 12, 1958, something about Dumbarton Bridge

4443 There is some footage marked 3/25/57, then in another reel more
footage of 4443...Question: was there more than one excursion with 4443. Also it was called the "Valley Flier", but don't know where it ran.

5/8/ & 5/9 1954 Pyramid Lake Excursion...3809, 4192,etc.

Mainly looking for dates on ones that don't have them, and routes and any other info folks might have. Would possibly also be interested in color images of some of these.

Some of you California guys should know about these?
Greg Scholl