I have done this a few times in the past, and it works well enough. But be sure to mark your cassette very clearly. To be honest, the potential for trashing photos is not insignificant.
If you are shooting different types of film often, then you should consider an extra camera body. I know it is not without cost, but it will save you a lot of effort and potential disasters. Way back, I shot only one type of film - Velvia 50, and was happy with one camera. Nowadays, I will find that really difficult. I could shoot B/W or different film speeds with much more freedom once I augmented my FM with an F3. I am sure you will find an FG, EM, FE, FM10, FE10 or similar body for next to nothing if you really look hard enough, and that can be used as the backup body for the type of film you shoot less often. In South Africa such cameras are practically given away.