Boondocking rocks in Mexico. There are two good places near Chapala up in the mountains about two hours away. Valle de Juarez, Jalisco has two rv parks that charge very little and are as good as boondocking.
Many little towns will be glad to let you stay in their city square. Ask for the presidencia, policia, or the tourist office. You'd be surprised how many places have city parks or presitas (smaller reservoirs) where can stay no charge.
We boondock a lot and shy away from rv parks. Most have bad electricity anyway, not worth paying for.
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Facebook Rving In MexicoOn The Road InLots of great advice and locations to be found.