Hello,
I work for an environmental research and eduction centre in Wales, UK: the Centre for Alternative Technology.

We're coming over to Washington DC this summer to take part in the Smithsonian Folklife festival. We're planning to build a roundhouse with strawbale walls.

Does anyone know where we can source round wood for the posts, henge beams and the principal rafters, ideally Douglas fir or Larch, 10 inch for the posts, 4-6inch for the rafters.

We need to source this material as close to DC as possible.

Thanks.