Diane, it's not as bad as you imagine. Having lived in ours from September to December 24th last year, because our daughter and family moved into our home until their house was built.
We had the cheap Sunncamp Panorama XL, which was a must because it gave us somewhere to dry the dogs off after their walks. The downside to the awning was on frosty nights. Due to the inside of the awning roof freezing, when it thawed it dripped over everything so we put our shoes etc. under the caravan. The awning took everything that the weather could throw at us with the exception of snow. Heavy rain, hail, gales, it took the lot.
Inside the van it was as warm as toast, at no time were we cold. If frost was forecast we left the heating on low. Last thing at night I brought the water pump inside because we got caught out once, having to thaw it out. Another item I bought was waterproof leggings, a boon for taking the dogs. When it was raining I would take the 3 dogs, one at a time, while Her Ladyship stayed and dried them on their return. It all worked like clockwork.
Whether you would like these conditions and call it a holiday I don't know but as I said before, it's not that bad and don't forget, we do get some nice days at that time of the year even if they might be damper from previous rain or dew.
When I went home on December 24th I was a little sad. After a few days I actually missed being in the caravan. The most pleasing thing about being at home though was when the dogs wanted a pee I could just open the back door without getting wet myself :O)