Best thing to do is speak to your club, since every club will have different rules. It's quite common to have some kind of minimum number of hours, e.g. you must fly at least 4 hours per day (or pay for that amount of time even if you don't fly it.)
Buying a share may be an easier way of doing this kind of trip without any minimum hours requirement. And, as a bonus, you still have the use of the aircraft after your trip!
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