We used to store a boat at Mariners Farm back in the 80's and 90's
(When old farmer Robinson ran the place as a farm and orchard, the storage was just a side line)
I think you will find the storage cost for motorhomes much of a muchness, £60-70 per month seems to be the going rate for areas just beyond the M25.
It's all about the security and access.
Most insurers want CASSOA Gold level of security (even if the location is not actually CASSOA registered)
Basically it must have:
Fencing and/or a berm all around the site, as there have been several thefts where the motorhome or caravan was simply driven through a hedge and across several fields. As fencing can usually be easily removed, it's the berm the insurance companies are looking for. (That said, a berm can be removed by a JCB in under 10 mins)
Monitored and recorded CCTV
24hr Security on site (IE the owner lives on site)
Gated entry: ideally double 'airlock' gates.
You then need to look at the facilities:
Most important is access. Is it 24x7 or less.
We turned down the boatyard in Rochester as access was only Monday to Saturday office hours. That only works if you are retired or very local.
Other facilities are things like electricity, water, can you dump the elsan or grey water on site, can you wash the van on site, will the site owner permit outside companies in to work on your van ?
