I have only been to Tulum a couple of times, and didn't stay nearby, once was a tour from Cozumel, and the other time was a trip from Cancun. I wouldn't be able to say what it was like in comparison to AC, but it sounds like you got some good info from the others who've responded...I really liked San Pedro a lot! I wasn't disappointed by it's appearance, but I did hear people say "You should have seen it BEFORE Keith", so I guess the difference is noticeable to those who have been before. Being a first-time visitor, I had nothing to compare it to. The trip to Cayo was really not bad at all- the road is well-paved up until you have to turn off to get to Chaa Creek, which is the last 2-3 miles. I would recommend 4WD if you are going to go exploring, especially in the Pine Ridge area- THAT road is bumpy! Rental ran us $95 per day, which didn't include insurance- we put it on our credit card, so VISA covered insurance. We had a Suzuki Grand Vitara, and were very comfortable and happy with it's performance. No problems at all on those bumpy roads! Wherever you decide to vacation, have a wonderful time, and God bless! Dawn

Oops...forgot to respond to your question about sunning! All the resorts have places to catch rays- around the pool, and even by the water; just not a typical sandy beach in most areas. You certainly don't need to rent a boat every day to get sun; and yes, I saw lots of people laying out on docks, too!