My view is only a somewhat speculative judgment. But they are aware that they have a problem and I assume they recognize a fair chance the problem will be effectively surfaced, maybe by his Democrat Party opponents at the Credentials Committee at the convention.
So I assume that he needs to make an assessment of what his (real) grandmother (Dunham) will say if he exposes her to the press; and to look at the actual paper record in the hands of the Department of Health with a view to developing a legend that will fit the documents if possible.
If I were the lawyer hired to manage a legal effort to unseat him, one of the places I would start would be Hawaii. So it stands to reason that is also a place he would go to firm up his defenses.
Pity we can’t get someone to dog his every step.