Hi Mark,

Yes, you can 'force' the Header row to have the 'word wrap' , with this CSS :

.wpDataTablesWrapper table.wpDataTable > thead > tr > th {
    white-space: pre-wrap!important;
}

If you want all your Table headers to have this, add this to the main Plugin settings/Custom JS and CSS/Custom CSS.

Or if you just need it for one Table, go in the Table's Customize/Custom CSS and insert it there.

If you have multiple Tables on the same Page, and for example, if this CSS makes the 'other tables' wrap the Header row - but if you just want to 'target' a specific Table ID - you can use the Table ID like this :

.wpDataTablesWrapper table.wpDataTableID-76 > thead > tr > th {
    white-space: pre-wrap!important;
}

Just change the 76 to your table ID.

Let me know if that helps.