HI Greg.

We did this same thing about 10 years ago.  We held a meeting where the entire auxiliary was invited, with the understanding that this was the topic of discussion.  We discussed a few items, asked again if anyone wanted to take over the executive board roles, which no one did and then we took a vote to disband the auxiliary.  We did have legal look over things also.  A couple of the auxiliary members stayed on as volunteers in different roles.  We then formed a volunteer advisory committee.  We meet to discuss any issues in the department, upcoming or new fundraisers, and get their approval for donations to our hospital Foundation.  I think you are on the right track.  I would just hold a vote, so everyone has the opportunity to say their peace and make sure it is well documented, and follow any legal direction.