Yes Rob, leave the guns at home.
You'll need Mexican insurance, either on your own policy or through Baja Bush Pilots, preferably written in Spanish.
A good night stay going down is Jean, NV, the strip right by the Casino with cheap rooms and cheap gas. Another option is Imperial Valley right on the border, cheap motel next to airport. No cheap gas! Can walk to town for dinner.
We cross at Calexico and do Mexican customs at San Felipe. Cash only-this was just year ago! Make sure you are familiar with eApis and logged on. Most people file eApis for the return trip before they leave, if they know the day they are coming back. We typically file for Calexico at 12: This means leaving Mulege at 7, clearing at San Felipe on the way out. Calexico has a good restaurant on the field.
Then after customs at San Felipe, lunch is at Alfonsino's for Fish Tacos (watch for high tide as the water can creep up on the runway.) or Puenta San Francisco's. Do not land on the pavement there. It is very bad, it should be X'd off. Land on the dirt/sand.
After whales, fly over to Campo Rene (Bahia de Las Ballenas), taxi up into their compound, shut down, have lunch or dinner, hike to the ocean and collect 100+ sand dollars in under 30 minutes!!
If Jack doesn't have the fuel truck at Mulege, depending on your excursions, you might need to put in 5-10 gallons of car gas to make it to Loreto, (credit cards) for fuel to get you back to San Felipe.
