Exactly.
If you believe that you have an impactation issue/death from sand , you will more than likely be in the guiness book of nz records as the only person stupid enough to actually believe that sand was or is the reason for the death.
I personally use east coast river sand . I find this to be a nice light colour , and very fine , so even if they do eat some , which my dragons tend to do probably every 2nd or 3rd feed , it just passes straight through them.
RE live food - bio supplies, local pet store(most expensive), knoxberryfarm.freeservers.com , trade me , or you could even do the.......long pause........ 'old school' catch your own . Please no-one start the 'you shouldnt feed wild caught insects to your dragon' blah blah blah debate.
From my experience like most pets/animals , Dragons are pretty straight forward , and the more you stress and fuss over every little thing , the more the chance you will probably end up doing more harm than good. Just follow the basics and you will be fine. (and dont believe everything you read!!!) .remember the story of how man actually landed on the moon .
8)