Please feel free to ignore my advice. My feelings won't be hurt, but here is
what I would do:

A:  with respect to 
a) Sunrise Bank, 
b) Affinity Credit Union
c) Woodbury Financial Services and
d) any other institution holding liquid assets for Marion

1) I would give them a copy of the trust.
2) I would NOT accept verbal assurances that they would
recognize you as successor trustee
3) I would ask them to provide you with the necessary forms for
Marions signature and yours, to set up at each institution a NEW 
trust account with yourself AND Marion as Co-trustees, using
Marions social security number as tax identification.
4) I would ask Marion to sign these forms in the presence of
two or more witnesses, as soon as possible, with the explanation 
that this arrangement would leave Marion in control of her assets, 
while permitting you to pay her bills.
5) Before flying back to Boston, I would return to each financial 
institution to set up the new trust accounts in Minneapolis/St.Paul 
with Marion and yourself as co-trustees AUTHORIZED TO ACT INDEPENDENTLY.
All accounts should have electronic access. At least one account should
have Bill-Pay facility.

B: I would obtain the name and the e-mail address of the attorney
in Wisconsin who has prepared a TOD (??transfer on death??) deed 
potentially transfering Marions interest to Felicia Ananda Lawrence Macindoe.
I will forward separately a draft e-mail letter which you might send
to the Wisconsin attorney.

C: I would negotiate with Marion and Judy about forwarding any and all bills
which Marion wants you to pay out of the trust. Since the post-office will
forward mail for only a limited period of time, it would be helpful if Judy
would be willing to collect and forward the mail. If you have it sent to
174 as opposed to 178 School Street, I can pay the bills electronically
out of the new trust account with bill-pay facilities.

D: I would ask Marion for copies of the most recent income tax returns,
if she wanted your help in preparing returns for this years' taxes.