Not specific to Carlsbad, but what I would really love to see Tesla, EA and other providers do is search for the great rural road trip routes that currently lack charging, and put in at least some basic fast charging on them. Not to make a lot of money selling kwh -- because nobody makes money selling kwh -- but because it sells cars, by making people know "my EV isn't barred from these great routes." Possibly push local tourist boards and chambers of commerce to contribute, or get carmakers to contribute. Or charge a lot more to use them. Or, if the government really wants to get involved with subsidies -- which it is doing to make people find EVs more acceptable -- this could be something for them.
SW New Mexico is one of the charging deserts. US-50 in Nevada used to be but they put in chargers. Southern Utah around Bryce/Escalante/Canyonlands is a major one. Northern BC and areas of Alaska (Yukon is well supplied.) Baja California. Eastern Oregon and some areas of Idaho. There aren't that many and you would be able to say, "there's nowhere among the major great drives you can't do."