OK, the areas you are desirous of visiting are pretty safe. If you plan on exploring the Blue Mountain range I would recommend more than just a regular road map but rather a topographical map. You can get topographical maps at the National Land Agency. You would need a sheet 13 or 18, don't quite remember which. I would further recommend that you not try to explore the Blue Mountains on you own but rather get a tour guide. Also note that if you want to get to the peak you will have to do some hiking in rough terrain so be prepared for that- good hiking boots, water, snacks etc.
Driving in Jamaica is a bit tricky. Road users don't necessary follow all the rules of the road esp. indicating be prepared for that. The roads can also be a bit narrow and winding. There is a Black River safari that you can try. You will go with a tour guide and get a guided tour of quite a bit of the river. Be sure to go down to Little Ochi for fish afterwards!
If you want to a good view of Jamaica also visit some attraction in the east e.g. Raft on the Rio Grande in Portland, visit Somerset falls and be sure to go by Boston in Portland for some jerk.
Familiarize yourself with our local currency and the exchange rate to prevent being excessively charge along the way. The truth is by yourself, with a none Jamaican accent, in areas that tourists don't tradionally go, it may just happen.
And don't be scared it is pretty safe. Stay away from Spanish Town, the garrisons of Kingston and any other area as stated by your embassy. You will be safe and do have fun!
Source(s):
Live in JA. Have visited these sites.