The town offers many basic necessities, including ice, gasoline, and a decent size market. There is an airstrip north west of town, and pilots who fly over low enough might attract someone to come out and pick them up. If not, it's not a long walk to town. Laguna San Ignacio is a couple of hours south west of town on fairly decent dirt road. This is an excellent place to watch the California Gray whales mate, give birth, and just generally play around.
Tours are available, and reserving one in advance is a good idea.
There are also some very old cave paintings in the hills out from San Ignacio. Most of them are not particularly easy to get to, but well worth the trip for those interested in such things. The beauty of the extinct volcanos Tres Virgenes , located east of San Ignacio, has been magnificently captured by Baja aficianado John Pelafigue. If one has the time to spend the night, the La Pinta Hotel offers good, if somewhat expensive, accommodations. After the long drive getting to San Ignacio many Baja travelers have a tendency to take a quick drive through town, snap a picture of the mission, and then get back on the Baja Highway.