The protest group pressing for a proposed Glenkens power line to be underground is to widen its campaign.
Galloway Without Pylons (GWP) has already set up a website to focus its efforts.
Now it plans to contact more than 400 tourism providers across the province seeking their support.
Spokesperson Paul Swift said: “According to VisitScotland figures Galloway Forest Park is the region’s second most important visitor attraction – and SPEN wants to put a line of pylons through it.
“We will be emailing B&Bs, crafts shops, hotels, caravan parks – anyone with a tourism business.
“We are going to ask them if they are prepared to send us a support letter which they would be happy for us to publish.
“Our objective is to put as many declarations of support as we can on our website.”
Scottish Power Energy Networks (SPEN) says the new link is needed to replace ageing pylons east of Loch Ken.
The company initially sought public approval for new overhead pylons along an agreed route west of the loch.
But fears over environmental and visual impacts on the scenic area prompted the Scottish Government to intervene.
Scottish Ministers instructed SPEN to appoint consultants to examine all options, including partial and total undergrounding.
They are due to report later this year after which SPEN is expected to lodge a planning application.
GWP wants the entire 32.5km line, known as the Kendoon to Tongland Reinforcement (KTR) to be buried out of sight.
Mr Swift said: “We have around eight months to gather more support ahead of the application being made. I do think the best we can hope for is to underground the line at key pinch points along the proposed route.
“Those would include the Bennan, the Raiders Road north of Mossdale, the Queen’s Way between Newton Stewart and New Galloway, Slogarie near Laurieston, Laurieston Forest and, lower down, the A75.”