Cheryl, the bigger the jugs of water the better. They'll retain heat for many hours, and that helps a lot with keeping the air warm around the plants.
I've got all my supply of polar fleece fabric sitting there waiting to go out and snuggle up the last of the big plants, and the little greenhouse shelf units. But it's still honking windy out there, so the blankies don't want to stay put. Hoping it will calm down before I go to bed so I can finish up properly. The brugs out in the yard are still not covered properly . .. Ah well, at some point you gotta let the leaves fall.
I am already mourning the loss of blooms on my Clero. Shooting Star. Took some pictures this morning but they will be toast tomorrow. They're in the ground and much too big to cover.