Firstly the caravan is 14 years old and wheel bearings are a spare part and consumable during a service as you stated. It was a general comment to see what bearing arrangement was on this van as they have never been changed.
I would not like to strip the hub and find out that they have a one shot application on them and then leaving me in a situation.
Baileys web site Prima leisure do not list a bearing kit for this model. Mileage has no reflection on this a bearing could fail at any time depending on the conditions it is exposed too. I have no concerns with the tow hitch as I have replaced the friction pads and damper recently. Regardless I would still like to replace them as it is good practice
Thanks