I'm another in line with bergandymog, Mounted a socket in the rear ply wall, 20mm hole. This connects to the battery via a fuse and allows me to plug in the Ctek conditioner easily. The Ctek options are great in that they give safe polarity connection in case of mistakes as a safety system and a no spark connection. They are one of the best options on the market and are designed to be a battery conditioner so unlike normal chargers they will have less detrimental effect on your battery. For over wintering you can get a Ctek cigarette mounting traffic light indicator and I plug this in at the dash and it gives me a quick easy visual reference to my battery state. The installed rear bulkhead socket also gives me another power source in the car for when out and about too. Something to watch out for when installing a rear bulkhead socket is where you drill for it! You want it to be located close to the rear hoop so as to use this as a cable run facility but you don't want to drill into anything behind the bulkhead or find that there isn't enough room for the rear of the socket.
Re. hoods, I have the easy-up mohair hood and in the winter I have the hood up but the rear bonnet style hold downs left undone. This I find keeps the hood crease free yet allows it to remain nice and taught through the summer months whilst in use.
A breathable indoor cover goes over the whole car and it sits on the car lift set on its first lock keeping the tyres off the ground and the suspension load free. It also seems to keep the wee beasties out too, but I guess there is always a first time! I also inflate the tyres to about 28psi as when I lower them for use there are no distortion issues when returning to 22psi. The spare stays at 30psi all year as it's easier to adjust down should I need it and this tyre will suffer indentations at the mounting points after some time. Every year just loosen the clamp and rotate it 90', I always go clockwise so every year it has a new contact point to the tyre and the mount.