Our proof in Texas is similar. Most wardens don't even really know what the regs say, as everyone tags the antlers and then cuts the head off...
I had one get his ticket book out already years ago. I had the tag zip tied to a hindquarter in a cooler and the head in our freezer without tag.
I had to get the TPW book out and read it to him, it is a CARCASS tag, not a head tag. Once head is severed it stays with carcass.
Luckily we don't have to leave anything attached, but when I've been in that situation I carry ziplocs as another poster noted... leave whatever in place and cover most with ziploc. I even go a hair further and run a long zip tie over the bagged/attached parts, poked through the hindquarter to make sure the tissue may not separate in the backpack etc
