Please find attached a review of the manuscript. The majority of comments can be found directly within the manuscript pdf file.

Reviewer 1 left some excellent line-by-line suggestions and edits, which I agree should be considered by the authors. Here I will offer a few general suggestions to add to Reviewer 1's comments:

1.  In the category groupings for your results (pg 6): “hybrid” seems to be an odd thing to include with other things that seem to be explicitly about on-site supports. With the importance this option was given by survey participants (76% of survey participants who are parents requesting it), it may be better to have this in it’s own category. Isolating it would emphasize it as a strong result and an important outcome.

2. One thing I think is missing from the Discussion is the feasibility of acting on the recommendations presented here. For example, one suggestion was to waive the fee for caregivers that accompany conference participants. Financially, this is a reasonable request. The caregivers aren’t participating in conference events, just watching a child for an attendee. The cost to the organizers to let these individuals access the conference building at no charge is extremely low. On the other hand, requesting child care while at the same time requesting no fee for children and travel support for families seems to be a bit of a financial paradox. How are the costs for childcare being covered in this scenario – higher fees for everyone? Some other source? In the middle ground is the family-friendly programming. If they are simple events, it is a feasible suggestion that only requires people who are willing to step up and organize the activities and conference organizers who are willing to allocate space for the event. However, more elaborate events that may require supplies or equipment (toys, activities, transportation) have costs involved and again the question arises as to who covers those costs. Then there is the hybrid meeting issue. As someone who champions this idea, the most common reason given for not supporting hybrid participation is cost. At many conference centers, there are outrageous fees associated with hybrid events and it simply costs too much to offer it at a reasonable fee to participants. There are likely other challenges beyond cost that would be easier to deal with. Even without a detailed discussion of these issues,  acknowledging that some of these ideas have significant challenges that would need to be addressed would help further the discussion in a constructive way.