Curious if any of you have been on these cruises or can comment (good or bad) on ships or ports? Trying to organize a group cruise w several families and we are torn. Want a fun, lively time for adults and teenagers but at decent price too. 

from New Orleans (600miles) on carnival dream for 7 days to roatan-Belize-Cozumel 
Prices are:
4 to room 3133 so 783 per person

8 nights from port canavaral (700 miles) on carnival magic to grand Turk- San Juan- st Kitts-st Martin 
4 people 3600 so 900 per person

from mobile for 5 days on carnival fantasy to Costa maya and Cozumel 
Pricing is:
4 to room 2023 505 per person

from New Orleans on carnival triumph to Cozumel and yucatan
4 to room 2224. 556 per person