BB ... the US Gov. lists no native range for Col. WOs (remember they are hybrids including one parent that is a non-native tree). Since Crimson Spire is part White oak, they should do OK/well within the range of native white oaks. Regal Prince probably will thrive in the native range of
swamp white oaks (see ...
www.na.fs.fed.us/spfo/pubs/silvics_manual/volume_2/quercus/bicolor.htm ) ... I would imagine both CS and RP would b e OK in plant hardiness zones 5 and higher. I doubt if you will find a commercial source of acorns; the nurseries are busy cranking out trees since the appear to be a strong seller. Bill, I've stored acorns in the fridge in plastic bags (sandwich bags) with air holes and moist paper towels and in bags with moist sphagnum as a preserving environment. I've also stored acorns in plastic and metal containers with holes in the plastic top(s) for entry of air. I don't worry much about overall viability
of all the acorns in the spring since I have direct seeded some in the fall when I acquired acorns and I always buy way more than I expect to germinate. Acorns are free (if I gather) or inexpensive (when I have to buy them). In the spring, I use a warming system to force acorns to germinate; I only plant acorns in the spring that have shot a radicle ... if I lose 35-40 % of 200 acorns it isn't a big deal. The key to overwintering white oak/chestnut acorns is to keep them damp enough to avoid dehydration, but dry enough to avoid mold problems. Sorry I can't tell you precisely where to get them (short of finding a tree with acorns). Maybe others who have an interest in col. WOs can contribute their insights.
"Swamp white oak occurs mainly in the Midwestern states from Iowa, Missouri, eastern Kentucky, and southern Wisconsin east to New York, Pennsylvania, Connecticut, and Massachusetts. Isolated populations occur northward in Minnesota, other New England states, and Quebec and Ontario, and southward to Tennessee, Virginia, and North
Carolina. For current distribution, please consult the Plant Profile page for this species on the plants". I would think optimal locations for RP might be zones 5-7 (I've seen references that say hardy zones 4-9). Areas with extreme heat / little rainfall probably won't support RP very well.
One other note: when I gather acorns I almost always get them as fresh as possible by picking them off the tree and getting them cold as soon as possible ... retains viability.