Look to history for some perspective
Aporoximately 15-20 years ago, most states in the Northwest had statutes in the Fish/Game/Wildlife sections that were blatantly unconstitutional, and they got their hands slapped for it in court. Most of these laws purported to create a legal presumption that anyone carrying an uncased firearm in the field shall be deemed to be hunting, and therefore subject to all the Fish/Game/Wildlife laws.
People OC'ing, whether handguns or long guns, were automatically subjected to LEO and Fish/Game/Wildlife officer contact and harassment based on the law, and were frequently charged with various and sundry offenses like "hunting without a license" or the like, even though they were just out plinking, hiking, camping, ATV'ing, etc.
Fish/Game/Wildlife officers lost what they considered to be one of their most powerful investigative tools - the ability to, upon seeing anyone with a weapon on their person or in their car, detain, question, search (with or without a warrant - yes, administrative agencies have a different standard that frequently allows the ability to search without a warrant within their administrative capacity, but there's not time or space to go into this warrant exception in sufficient detail), cite, and arrest anyone with a weapon.
And they're intent on bringing it back, slowly, incrementally, and they hope quietly.
Be very afraid that they're even touching firearms laws. One of the principles of statutory construction (the way judges are supposed to read and interpret laws) says that all laws are to be considered together, and on the same level. So, the pre-emption law is considered at the same time, and on the same level, as the new proposed law - and unless they have blatant conflict, are considered equally valid. Basically, if the new law doesn't blatantly (in the wording) conflict with the pre-emption law, then it's perfectly valid.
That means your OC in the car/truck/ATV, whether handgun or long gun, can be a criminal offense IN SPITE OF THE PRE-EMPTION STATUTE!
Contact your legislators to kill this bill immediately - if you don't, you're allowing bureaucratic and LEO convenience to override your RKBA.
Oh, and yes, I am an attorney, and a former prosecutor who worked closely with game officers often, and was almost universally disliked by them because I dismissed or refused to prosecute BS cases when they brought them, and supported the amendment (in my home state then) of the law that got rid of the presumption that carrying a firearm in the field equaled hunting.