Cover for R1250RS with panniers?

[Lee]

Thanks.

That covers the light duty side of things.

Any suggestions for a full bike cover, still including panniers, light-ish weight and reasonably packable?

Full covers are usually bulky because of the heavier heat resistant material on the lower half of the cover.
E-Z Touring has a full cover using the same thin rip stop material as the half cover I mentioned above but you'll need to make sure the bike is cooled down before putting it on because the lower half is not heat resistant.
https://eztouring.com/product/wanderer-a/