Are you looking for more "professional" ones or just a "we were here" one because if you are looking for more professional group shots ones like most teams do and you plan to use them as 'publicity' pics then you'll prob be treading on fine ground as for permisablity of that and you may run into problems with disney. I would personally contact Guest Services and ask what the rules are on it, whether its just fine or if you need to hire a professional photographer from them or whatnot
-em