I posted my analysis of HB823 in the thread, Carry in vehicle? in the General CHL Discussion forum. I've also posted a short update to that same thread.
Short answer, I believe HB823 provides the protection Chairman Keel intended and so does NRA General Counsel. Could we be wrong, sure, but I wouldn't take a position on the issue, if I didn't feel good about it.
Also, contrary to a post on packing.org, TSRA's position is not that HB823 is ineffective at achieving its goal.