All of my cave gear is in Tulum in storage. My wife will fly down so minimal stuff in the truck.If you fill it full of “stuff”, you will likely be stopped by a federale on the road and pay an import tax.
Pay the tax, it’s usually less than $100, and negotiable. Unless it’s at a border check station, than it’s less negotiable.
Do not ask for a receipt. You can try the second time to explain how you already paid the tax, but in the end, pay the tax again.
Do not get offended.