Excuse my ignorance, I opened this expecting mallards or some such; never knew this was a sky feature, which part of the sky is this in it looks a great shot.
Do you have a changing bag if so you could work in it to open the camera and rewind the film out to a spindle then into a plastic film case which you can hand to whoever is carrying out your development
Make sure to tell them the film is not in a canister
Failing that take camera body to a camera shop who do in house development