Leave them where they are Annie - they are as hardy as old boots!
They will do much better outside than in pots!
If you dig up a "sod" of them, you can transplant a few elsewhere.
The only difficult think is- you should enter them as Limnanthes douglasii into Ideas Genie and Flower Genie
with their Common name as well, of course
Here's a web page for reference and good info:
http://www.bbc.co.uk/gardening/plants/plant_finder/plant_pages/488.shtmlOnce you have them, you'll always have them! Personally I love them.
After the flowers die off in mid summer, the foliage dies and forms a brown ugly mat. Put up with it for a few weeks (the good thing is it keeps weeds at bay - clever plants!) then when well died off, gather up whats left. The plants have already dropped their seed - a few weeks later, up comes the next generation. Ive had them flower a second time in one year. They will come back in
abundance.
Allocate a good size patch for them in a nice sunny spot. Let them "naturalise" there.
I'll dig out a few photos later.