The work vehicle behind it is a Westminster Iron Works 2-truck maintenance of way speeder. I posted a link to a photo a few years back, but here's the photo as an attachment:
Built around 1940 by Westminster Iron Works and the British Columbia Electric Railway shops. It was used on the BCER's Jordan River Hydroelectric Dam railway, which ran parallel to the wooden flume that brought water from the dam to the power station, about 10 km. An interesting hike, as much of the flume and some of the line was abandoned in place.
The locomotive also came from that project and is a Plymouth TL2 circa 1928 (not a Davenport). See also:
The Shay locomotive "guarding the gates", by the way, is standard gauge, not narrow gauge. 42t Class B Shay CN 2475, built 1911 for Bloedel, Stewart & Welch as their #1. There is an operating 25-ton Class B 36" gauge Shay on the property, but it is usually only in steam for special events during the summer. They also have two 0-4-0ST Vulcans from a mine and an 8-wheel crew speeder which was also built by the BCER and WIW for the Jordan River line. There are also 15 or so other narrow and standard gauge locomotives or speeders that are plinthed or in storage.
The museum is about an hour's drive from me, so I have photos and can take more if people want them.