Hi Steph

This is discussed a bit in https://totara.community/mod/forum/discuss.php?d=17108#p7766

Email client support for multiday events is not very good - it is possible to change the face to face settings as below so at least an email is received for each day of the event that can be put into your calendar. 

Site Administration -> Plugins -> Activities -> Face-to-face -> One message per day

regards

Craig