I ALWAYS get fecals no matter what.
I just zip-loc bag some poop and stick it in the fridge, NOT THE FREEZER!! The freezer can kill bacteria and give false results on the float. In the fridge I only let them sit for a day, maybe 36 hours at the most until I bring it in.
I have to go to my local reptile vet for my floats, the regular ones around here won't do em. Not a big deal though.
Since there's no exam fee, just the fecal, they cost me 15 bucks
HTH