Plenty of life down south brian, and for those who are lucky enough to have a car to travel down, they will be very suprised at some of the places. Like you, we have covered a vast amount of the island but still look for places off the beaten track, which can sometimes turn out to be little paradise coves with some privacey if you wish to be alone.
Excursions if your staying down south is great but limits you to what you can see and if you wish to stop for a photo shoot you dont have much chance.
I would recommend you take a look at as much of the island as possible, some people dont ever get out of one particular resort which is a shame really as they are missing out on so much.
As for reps?..well lets face it they are only there to make as much money from us as possible selling trips and rather expensive ones at that, better to go to some other place that does trips just as good if not better than what the reps can offer and at half the price too.