Myra, I have all my plants (with the exception of the lilies) planted in the rocks: sedges, rushes, mini cattails, plantain, water celery, water penny, pickerel weed, Siberain Pink cups, water clover and others all in the rocks... and I don't bring them in during winter either. They either make it, or they don't. I'm in zone 8 and it doesn't freeze much here, but I do get ice on the pond 1-2 times a winter.
I started with plants in pots, but the ratty coons love to knock them over spreading dirt and gravel everywhere. Then I used nylon stockings filled with cat litter. The contained cat litter was easy for them to dig out - the coons then bit thru the nylon and spread cat litter all over. It was desperation that drove me to planting in the rocks and for the most part, they don't mess with 'em.
I have strawberries and cream planted outside the pond in the margin - it spreads pretty fast and is tough to remove once it gets a foothold. It likes moisture and I have fears for what it might do in the pond.
Try it and see... I bet most, if not all will survive.