There is very little authority upon this subject; lawyers seemingly assume that the picture is complicated enough without venturing into new fields. In only two jurisdictions are there actual reported cases where the donor has tried by specific provisions to restrain creditors of the donee.
S. W. Boyce, Jr.,
POWERS - EXCLUDING CREDITORS OF THE DONEE OF A GENERAL POWER BY EXPRESS PROVISIONS BY THE DONOR,
Mich. L. Rev.
Available at: https://repository.law.umich.edu/mlr/vol41/iss2/9