If you keep it to just two sessions (or even two days of smoking) I think any tolerance you do develop would be almost unnoticeable. Even if you smoke two days in a row I think the rest of the week would be plenty to keep everything in check. I mean, when you start out with a zero-to-no tolerance and you make a conscious effort of controlling your habit, on those days you smoke you won't need much to get stoned as fuck for the day-- and, as we all know, if you smoke infrequently and relatively small amounts, any tolerance is unlikely and slow to develop.
The main thing is just controlling yourself, though. In the beginning it'll probably be a bitch limiting a favorite habit/pastime but it'll become easier as it becomes the normal routine for you, just like most other things.
The main thing is just controlling yourself, though. In the beginning it'll probably be a bitch limiting a favorite habit/pastime but it'll become easier as it becomes the normal routine for you, just like most other things.