When I was visiting Costa Maya I rented a bike from one of the local vendors and was able to explore and cover much more ground than if I were on foot. So that was really nice because the beaches I got to visit were alot more laid back with less visitors and I got to see more of Quintana Roo than if I had only stayed in the tourist district. The tiny roads were nearly empty so I didn't have to worry much about any vehicles or getting stuck in traffic. If you do a cruise excuring try renting a bike too!
rent a bike from one of the local vendors its fun.