I guess, if Hinata ends up with anyone, I think it's more likely to be an arranged marriage with Neji or some unnamed clan member. Although it seems like they both knew about Hinata's feelings for Naruto at the end of Part 1, and neither really seemed jealous, so I don't know. I'm guessing her husband's not going to be shown at the end, and we'll see her as the new head of the Hyuuga clan. That way she'll have improved herself and earned her family's respect, and her character won't be left completely unfulfilled in the epilogue.
By the way, I love the GS sig.
I'm not sure it's a matter of being "worthy." Do the Hyuuga even allow marriages outside the clan? We've never seen a Hyuuga not possess the Byakugan. However, this doesn't prove they don't exist. I think the problem is we know very little about how they function, at least, beyond the basics of the Main/Branch family distinctions and that Hiashi leads it. You can make assumptions based on how traditional Japanese clans operate, but that's all they'd be; assumptions.
Assuming they did allow such marriages , I think Naruto wouldn't have to worry about being worthy (at least the way I think you mean it) for three reasons. One would be he is the village savior and defeater of Pain. Two, if he decided to use it, his own lineage. Three, Hiashi himself. He recieves a rather negative portrayal prior to the fight with Neji, but afterwards he's apologetic and the circumstances of the entier ordeal are revealed. While not father of the year material, I was left with the impression that Hiashi isn't that bad a person. At the same time, this change is only shown in the context of Neji and his father and how far it goes after that is unknown, so I admit it's only an impression. But that being the last time we got a decent look into who Hiashi was, I don't know if I could see Kishimoto going back on that by making him a complete hardass when it comes to Hinata and Naruto.
Actually, I don't see Kishimoto touching on these things at all. While the clan dymanics make for interesting stories to tell, none of those stories have much relevance to the one Kishimoto is telling now, so their resolution isn't important. We may get a small blurb at the end because it matters to Neji, but that's all we should probably hope for.
I think Naruto's problem would be different. During the fight with Neji he talked about chaning the clan. If the clan is populated by a lot of people with a vested interest in seeing the status quo remain as it is (which it probably is), Naruto is the last person they would want anywhere near the clan, especially wed to a person who may be in line to lead it.
The other point of contention I have is the "arraganed" part of it. If Hiashi essentially has dictatorial control over the clan as its head then, maybe....but really, if the clan (in particular the Main branch) is full of people who want to see the status quo maintained (it's continued existence suggest there probably is; I have trouble believing an arrangement that basically enslaves Branch members existing solely out of tradition), I can only imagine the hell that will be raised by a marriage specifically designed to eliminate an institution they want to protect. If they are together, especially for that reason, it's because Hinata and Neji wanted it, not just because Hiashi or someone else did.
Second, its arrangement being someone other than Neji and Hinata, to me, flies in the face of the purpose behind its existence; i.e. being forced into a marriage when Neji's whole schtick prior to Naruto was predeterminated fate and that they are forced by a possible clan tradition into well...opposing a clan tradition.
Besides, Naruto being "accepted" into the family will not be why NaruHina does not happen. Wouldn't that reason for the pairing's failure actually reinforce the clans authority and its traditions while his inclusion and bucking of those strike against it?
If anything the "clan argument" against NaruHina would be the sheer irrelevance of a lot of these issues, Hinata's own irrelevance, and possible the fact that Neji can accomplish a lot of what Naruto could and, as a character, is better suited to that role.
EDIT: I don't mean to suggest NejiHina as a couple. I think they could still accomplish alot of those things without having to actually get together. I really don't know (nor care) who Hinata ends up with.