I heard that you can also start them from seed, you may want to let the ones you have flower and go to seed, collect the seeds and scatter over your new area. I heard/read that the virginia bluebells don't like to be moved. I just planted some this year from root, not sure if they're going to take or not. if not, I'm just going to get some seed for next year (at the recommendation of a local perennial nursery)

Here are some photos I just took in my yard of Spanish Bluebells and why I consider them aggressive weeds. Please note that I never planted them, they have spread by seeding and I've been digging them out twenty years....all these beds were lawn when we bought the house but there were some Spanish Bluebells in the neighbor's yard and on the side of the house by a big Hydrangea that seeded....Yes, I know I've got other weeds too ;) They grow up into the crowns of other plants and are very hard to dig out. They just finished blooming so they aren't as easy to see in the photos. They'll turn yellow in a couple of weeks and get very slimy and attract slugs like crazy too.

See link. FataMorgana Here is a link that might be useful: Google Results - Mertensia virginica seeds

I think both of these plants will do OK under pine trees. I am assuming that you live in a climate that these plants naturally inhabit. If you live in the deep south or out west, you may not be able to grow these plants at all, regardless of the type of tree over them. In the northeast and midwest both plants are usually found under broad-leaved trees, but they are both adaptable. If the only shady place you have is under pines, that is where you should plant them. I would make sure to water periodically this summer because they will not have well developed root systems. Both may go dormant earlier than normal this summer because of the transplanting, but should return next spring. If they appear to die after you plant them don't give up - it is normal for them to die in midsummer (and maybe earlier this year).