Here is a browseable listing of pet friendly self catering cottages in Gwent sleeping 4 - 5 guests.
Cottage list - Refine search
England - Scotland - Wales
Devon - Cornwall - Lake District - Highlands - North Wales - South West Wales
Treowen Monmouth, Gwent, Wales
Caerleon CastleCastle
Dixton, St Peter's ChurchHistoric Church
Caerwent Roman TownRoman Site
Monmouth CastleCastle
Caerleon Roman Fortress, Baths, and AmphitheatreRoman Site