I love harnesses and vehicles and am happy to see this new section. I make harnesses, but making any sort of cart or wagon is way beyond me so it will be nice to meet some wagon makers.
Here are some photos of my collection. All harnesses made by me (except the two sets of Scotch peak show collars which were made by Tiki Kulp... one of these days I'll get around to making the rest of the harnesses.)
Here is a Breyer Meadowbrook cart and Country Gig. The rest of these vehicles were all made by D&H, who I believe is no longer in business.