Based on advice from multiple sources we never have originals in our car. We have a fireproof lockbox in the motorhome - hidden but in easy reach if a quick getaway is necessary. We also have easy to get copies of all motorhome documents we can provide while keeping the originals hidden in the lockbox. All our originals and legal documents and anything of value is in that box along with copies of things like all credit cards etc. I do not know if carrying only copies is the best advice but we have been doing it for years with no problem. We do use the originals as well as multiple copies when we do our border crossing ceremonies.
We buy our Mexico insurance based on what they claim they will do for us if we have any problem in Mexico. We get the ones that say they have an 800 number we can call to get in touch with a local attorney who will take care of any and all legal matters for us should we ever need them. We have never had to use them so do not know how well they really do. We use Lewis & Lewis because many long time Mexico travelers have claimed they are the best. We have no idea from any personal experience if any of these promises have been kept.
In the car we only the "valet" key which does not have the special stuff the other keys have - whatever that may be. The "valet" key turns in the ignition and can be used to start the car. I am not sure if this can be copied or if the need for "all the vehicle keys" would include the "valet" key - but maybe a copy of the "valet" key could be the one in the car and the only ones the thieves get so you would still have all the original keys.
This is all hindsight I know but maybe others can plan for these things happening by using some of the above. When we get back to the states I am going to see if we can get a "valet" key copied.
I am sure there are other tips other forum members might come up with.
