Holy crap I missed the pound part. Yeah please don’t do that my friend. In a very very small number of states a pound might only be a misdemeanor but you’ll definitely get trafficking which is almost always a felony. Just don’t do it.
If you absolutely insist on moving that much vacuum seal, clean with alcohol, vacuum seal again, clean with alcohol and vacuum seal again and clean with alcohol. Every alcohol cleaning should be hands, package. Everything. Ship USPS without a signature. Not Fedex or UPS. USPS needs a warrant to search your mail, the others do NOT need a warrant as it’s their property. Funny how that works.