Been there a few times on a scooter. Try both ways, main road and over the mountain. Heck try a 3rd way, through the cane fields (on the roads though).....a very nice ride....all 3 ways for their own reasons. Along the way random dudes on motorbikes will try to escort you and win your business....beware or strike up a firm deal. They will want money for the escort over, money if they are a tour guide......plus they get I think $5 just for bringing you. If you feel comfortable getting there tell them you are all set and you are meeting up with Carlos one of the guides and they will leave you alone.

Don't rule out a visit to Sav, it's a wonderful town without the tourist bs like Negril. Plenty of good prices at the markets.

For the rat bat cave and Marley tour google them and you will find my reviews. "Boot" is your go to person for both or at least for the Marley tour. $5-$10 is more than enough for his time unless you spend all day with him visiting the speedway(auto racing). For the rat bat cave please give a likkle something to the yam farmer who maintains the trail. Oh, the trail starts 3/4 the way up the drive to the school.....but parts of the upper path are above the cave with holes leading down to it.....dangerous without a guide.

I could go on and on....