Why would anyone wish to keep a motorhome that is not covered by insurance?
There have been plenty of motorhomes that have been destroyed by fire (either accidental or vandalism) over the years. Also there is always the risk of theft.
Even in a secure storage site I would not even consider not having insurance
Ska 1951 has pointed out the pitfalls
You may find that the storage site insists on insurance
A day of all things motorhome and campervan. The show is held both in the main indoor arena and across the grounds. Catering, hot drinks and food options are available. Easy access to the site and free parking included. Win one of five pairs of day tickets