We just came back from the Easter cruise (First cruise of the season) and the checkin procedure was farsical it took us nearly 4hours from the time we landed till getting onto the boat.....there were 5 flights that all arrived into Palma airport at the same time - Island told us this is not a regular occurence but I dont know??
But in theory there is enough time to get back off and explore Palma first before sailing. They will state the All Aboard time at the exit before you leave ( I believe it takes about 45mins to walk into the Catherdral, centre of town and the same time back.
Went on same trip last year on island star loved the trip, would think you should be on the ship by 11.30am and think you would have quite a bit of time to explore Palma although it is quite a walk although the local buses and the open top bus goes from the main road near the cruise terminal One trip I would recommend the boat and blue mosque trip in Istanbul Enjoy the trip sorry im not a smoker.
We were on island escape last year and my husband was smoking he used to go to bar at pool for smoke you cant smoke in cabians its the mirage bar thats the one at the pool side also you can smoke on one side of pool but cant remember what side you can smoke in some parts of bounty club mind you that was last year it might be changed this year but i think they will have certain arears you will be able to smoke you will enjoy your cruise no matter what we have done island every year since 2003 for our silver wedding we have done star first year she came out 2006 try her as well hope ive been of some hel.