Python: Writing Images and dataframes to the same excel file

I'm creating an excel dashboard and I want to generate an excel workbook that has some dataframes on half of the sheets, and .png files for the other half. I'm having difficulty writing them to the same file in one go. Here's what I currently have. It seems that when I run my for loop, it won't let me add additional worksheets. Any advice on how I might get my image files added to this workbook? I can't find anything about why I can't add any more worksheets Thanks!

dfs = dict()
dfs['AvgVisitsData'] = avgvisits
dfs['F2FCountsData'] = f2fcounts

writer = pd.ExcelWriter("MyData.xlsx", engine='xlsxwriter')
for name, df in dfs.items():
    df.to_excel(writer, sheet_name=name, index = False)

Then I want to add a couple sheets with some images to the same excel workbook. Something like this, but where I'm not creating a whole new workbook.

workbook = xlsxwriter.Workbook('MyData.xlsx')
worksheet = workbook.add_worksheet('image1')
worksheet.insert_image('A1', 'MemberCollateral.png')

Anyone have any tips to work around this?

Here is an example of how to get a handle to the underlying XlsxWriter workbook and worksheet objects and insert an image:

import pandas as pd


# Create a Pandas dataframe from some data.
df = pd.DataFrame({'Data': [10, 20, 30, 20, 15, 30, 45]})

# Create a Pandas Excel writer using XlsxWriter as the engine.
writer = pd.ExcelWriter('pandas_image.xlsx', engine='xlsxwriter')

# Convert the dataframe to an XlsxWriter Excel object.
df.to_excel(writer, sheet_name='Sheet1')

# Get the xlsxwriter workbook and worksheet objects.
workbook  = writer.book
worksheet = writer.sheets['Sheet1']

# Insert an image.
worksheet.insert_image('D3', 'logo.png')

# Close the Pandas Excel writer and output the Excel file.
writer.close()

Output:

See also Working with Python Pandas and XlsxWriter in the XlsxWriter docs for more examples