Michael, just a quick thought.
Okay, nothing is very quick with my replies, but...
I always clamp off my oil feed line to my '76 HD Shovelhead as it tends to sump after sitting for over month without running. So in the winter I have been using needle nose vice grips, but I was at Harbor Freight last weekend and they have hose clamps with round rod and a flat metal clamp area for the purpose of clamping off hoses. They come as a kit with four different sizes. I bought them for $3 or $4, can't remember, but it was a good deal.
I've got my smaller one on the line and it will not mark the hose from being clamped.
I would highly recommend clamping off the feed line from your oil tank just as a precaution. Tie a string to it and run it back to battery lead so when you re-install your battery you remember to remove the clamp.
Enjoy your winter...
