It is a felony to deliberately hinder federal law enforcement, no violence needed. Not to mention leading a caravan is also likely took ant least some level of organization, making it also a conspiracy to obstruct federal law enforcement
under federal statutes like 18 U.S.C. § 111, which criminalizes assaulting, resisting, impeding, intimidating, or interfering with federal officers, with penalties potentially reaching 20 years in prison depending on the specifics, especially if force, weapons, or serious harm are involved. This falls under general "obstruction of justice" or "obstructing a federal officer" charges, making it a serious federal crime, not just a misdemeanor.