I don't like plastic bags at all. Period. My tobacco is stored in tins and then transferred to small mason jars for use. I don't travel at all either. I moved to where I am (Prince George BC) because I hunt and fish and live in an outdoor paradise. So if I'm out in the field, I make day trips. I want to process my game or fish that day, and I do it at home as soon as I get back. I almost always hunt and fish alone because company is a pain in the butt while out in the field, unless it's road hunting for rabbits or grouse. Then it can be social. For antlered game or bear, people get in the way and talk too much. I field dress, bone out and pack out what I get immediately. I don't have to pack out far, maybe 50 yards or so at most. As I said, I live in hunting/fishing paradise.
I usually just take a couple of cigars and put them in the glove compartment for day smoking, along with a container of chew. If I do take a pipe, I will put a pipeful or two of tobacco in a plastic flip top pill bottle and put it in the glove compartment with the foil or cello wrapped cigar. No gourmet fare. Loading a pipe from a plastic bag?? Get serious. Total pain in the keester. And frankly, the wafting of smoke outdoors is the best way of alerting already wary game. Chew is best.
The only use I have for any plastic bag is for freezing berries, morels or other gathering fare that abounds in this paradise.