I saw the title and immediately thought Carmarthenshire CC - they are a nightmare. I never knew about the blog!
I did what they always say you should, arranged a meeting, (no charge thankfully) said what I planned and hoped to do, and in every case was told I need full PP (less than 5ha) and that he would refuse!!!!!
I have a polytunnel, yet to be put up in our lower field, a field shelter that has been stuck in the same spot for a couple of years now, and wanted to offer yurt/camping in our top field which has lovely views.
His response was that yurts would require change of use and we wouldn't get that outside the development line - who wants a yurt in their garden, who'd want to stay there?! The polytunnel would also need planning (got to have feet concreted in) as would the field shelter unless it was moved however often. Thing is I probably wouldn't get permission for the field shelter as there are houses nearby in all directions and animal housing has to be 400m from domestic dwellings I think.
I'm hoping to get round all this as planning fees are ridiculous, and neighbours would totally object, by renting enough land close by to take me past the 5 hectares so I only need to do the 28 Day Notice under Permitted Development.
Fingers crossed eh?!