In order of preference, my favorite styles are the short/short, short/long, and then tank/short. I do not wear nightgowns (yet), but I am certain I’ll give them a try soon.
I find that Lake Pajamas run true to size. I wear an XS in all pairs. I have one pair of the pima weekend style and feel they are slightly looser and lighter weight than the regular pima sets, although I still get my normal size.
As for care, I wash mine with like colors, dry for 10 minutes and then hang to dry the rest of the way. I’ve read many reviews that say they wash and dry like normal so I think that would also be fine.
I also love their striped sets for kids. They have a few colors that I’m considering ordering in the next size and saving for their Easter baskets next spring.