No. For much the same reason why they opposed becoming an Organized Territory, they (or at least their leadership) prefer the current arrangement. They perceive it as keeping their options open without committing to being a permanent part of the United States. After all, they know full well that Statehood will never be an option for them. If their preference changes, then I'd support universal citizenship, but it's not particularly difficult now for anyone there who wants citizenship to obtain it.
Only if you have no brains. 
I don't know about that. The Samoas together have over a quarter-million people, that might could make a state (I'm assuming Samoa would probably accept if offered). Guam + NMI is over 200K people, that could probably make a state too.
Yes, these two states would be low population, but it doesn't really matter in the grand scheme of things. Combining them all into one state would be tricky because of International Date Line issues, but that could be an option too. (I wouldn't add them to Hawaii, because Hawaii's population would dwarf them.)
If the Samoas combine, it almost certainly would be by American Samoa joining independent Samoa. Moreover, American Samoa and Samoa have been diverging in culture and interests over the years as their culture adopts American and Kiwi influences respectively. Incidentally, until a few years ago, Samoa was on our side of the IDL but changed to bring them into alignment with New Zealand, time wise. So the idea that (Western) Samoa would consider joining the US, even as a state is ludicrous.
As for Guam + NMI, yeah, it'd be smallish tho doable. It might even be needed to get Puerto Rico admitted as a State as it would be Republican counterweight to admission of an expected Democratic state. Of course, it would be hilarious if it turned out like the last pair of states where Republican Hawaii was to be a counterweight for Democratic Alaska.
Has there been a referendum on it, though? If there was one, and they decided the way you're saying above, then no. But I can't help to feel like they would whole heartily want citizenship.
I love the smell of knowing-what-they-want-better-than-they-do in the afternoon. It smells like ... paternalism. The lack of any agitation on the part of the islanders themselves isn't sufficient evidence apparently. Ruining their tuna cannery industry by imposing mainland minimum wages some years ago apparently wasn't enough to convince some people that imposing mainland values on them doesn't always work in their interests.
Poll
