I don't know about where you are in PA but there's a decades old spring blooming camellia in my sister's yard in Delaware County, PA (Longwood Gardens is also in Delaware County):

It's not as formal as the Pink Perfection flower, but is still quite pretty and stunning (and cold hardy...lol). We have no idea what cultivar it is but the closest that makes some sense was the "Ice Follies ICE Angels®" (Camellia williamsii x oleifera 'Ice Follies') or perhaps an early sport of it. The previous owner of the house, who was the original owner (and had died long before the house was sold by his grandson), was supposedly a horticulturalist and had alot of interesting plants in the yard. Judging by the size, this has been there a long time, was planted in a south-facing location, and before my sister and her DH put up the fence (the fence is 6ft so you can see how tall this is), it was about 6ft - 8ft out from the neighbor's garage seen in the pic. There were 2 massive holly trees along the back that my sister removed, that had provided it shade from the western sun, although some other trees do remain there to block some of it.

I have a baby C. sasanqua 'Cleopatra' in a container inside. I want to get a C. sinensis 'Rosea' this year too.

'Pink Perfection' is a spring-blooming C. japonica IIRC, and in the northern areas, it's recommended to go with the fall-blooming C. sasanqua, as C. japonica buds might get fried in cold winters if not protected. However, anything that is crossed with the very cold-hardy C. oleifera (which I believe my sister's tree has a one of its parents), could give options for both fall and spring-blooming cammies.

Look for Ackerman hybrids in either case, although I really don't know if any of those would do well planted in the ground in a Zone 5. As it is, these plants are marginal in 6 and 7.

I included a link below to a little article written by Ackerman from the Intertnational Camellia Society, regarding some of his work with cold-hardy camellias and some that are recommended for colder areas. Reading the article, it makes me wonder if the "test sites" that he mentions in PA included the house where my sister lives because certainly no one in the neighborhood (and there are still many original home owners there from the '50s who are now in their 80s) even knew what the heck that was (and neither did we) and always wondered! LOL

Good luck! I container grow all my plants being in an apartment, but one with a balcony and it's not impossible to have trees and shrubs growing and blooming in containers for your enjoyment!