What about a spacious one bed flat (annexed to owners' house) on the edge of the New Forest and they take dogs. Sleeps at least 3. Don't know if it's vacant next week but I could find out for you if you are interested.
I seen a few for hoseasons holiday parks(shorefield country parks)waiting on son to come in from work to check them out.
ladybirder I will show it to son and get back to you.thanks.