Pause Retin-A Use Prior to Sunny Vacation?

I began using tretinoin 0.05% two months ago. I've been very careful about applying and reapplying sunscreen everyday, and avoiding sun as much as possible (which is easy as I live in Vancouver). I am travelling to the Caribbean for two weeks beginning at the end of April. Obviously, I will be doubly careful about sunscreen application while I'm there...but should I also discontinue use of the tretinoin while I'm there? If so, how far in advance should I suspend my tertian use?