Our roadster staying indoors with a soft Morgan indor cover.
But I use car covers from Specialisedcovers.com for 3 of my other cars, excellent covers, had them for 3 years now and no issues,, not cheap but well made and do a brilliant job.
This year I splashed out for a system called Premabag, where you drive onto the base of the bag and leave 3 PermaPack® moisture absorbing cylinders under the car before zipping up for the winter. Then using a Thermo-Hygrometer to monitor the moisture
Granted this is not cheap, but no more room in the double garage, and still beats the cost of hiring indoor storage
