I have an app called "My GPS Coordinates", a free Android application (it serves ads.) See
https://play.google.com/store/apps/details?id=com.gpscoordinatesandlocation
With the smartphone's location service set to "on" the app prints your latitude and longitude on the screen. There are some buttons to share this with other apps and you can also copy the data to the clipboard (via a menu). If you cannot be shown an ad (such as if you are in airplane mode) it still works.
When you share with email you get a canned message like the following to which you can insert a subject line, attach photos and add and edit text (like: "We finally made it! See attached pics. However, Mary broke her ...") and then send the message.
The canned message looks like (6 lines of text):
Latitude : 42.880588 (42° 52′ 50″ N)
Longitude : -8.544630 (8° 32′ 41″ W)
accuracy of signal : 9 m
show on google maps
https://maps.google.com?q=42.880588,-8.544630
This message was sent with
My GPS Coordinates, a free Android application