Lane Farm in Wales is an excellent example of what you're looking for. It was recommended to me by qdmqdmqdm and was a great find. I've also found the horse and hound hotel in Eggesford good, and Bolt Head has an adjacent hotel also.
All grass, no drama. Ireland is a paradise for that sort of thing. Can suggest my book "Aviators Guide to Ireland" and will put you in the right direction for places such as Enniskean with fishing/accomodation onsite.
Er indoors prob the most important factor in all flight planning
Irish