well if you can get to the alternator belt, then just try turning the alternator pulley round! its driven off the cambelt, so if the belt is snapped it will be really easy to move, if the cambelt isnt snapped it should be just about impossible to turn it by hand
how hard is it to remove the rocker cover/s? thats another way you could see easily wether the cams are turning over or not. i still dont see whats so hard about removing the cambelt cover lol, it cant be more than a few bolts, you cant do any damage just taking it off