I also recommend using real weather for this charter. In the winter our weather can be rather interesting. Bearing the brunt of the Atlantic weather, high winds, driven rain and poor visibility are par for the course and you should seriously consider grounding your plane rather than fly if the weather is bad. It's certainly not for the novice. Even in summer the weather is unpredictable and can change quickly. We have a saying; "If you don't like the weather, wait 15 minutes."