October 24th, 2021

We have learned that previous sinkholes to La Brea have sealed themselves. This means the visitors may be living in 10,000 BC for the rest of their lives.
While Levi brought some much appreciated Meals Ready to Eat, it would be prudent to send the visitors a few thousand pounds of supplies from the surface to build self-sufficiency. 
Some durable camping equipment and perhaps some clothing such as the Army's Extended Cold Wet Weather designs will be appreciated. Tools for wood working, blacksmithing and books on other arts and crafts should be sent. The natives of Tasmania and the Tasaday of the Philippines lost the ability to make fire and clothing. Books can transmit learning across the gap of an uncaring generation.
Of course I have ideas about weapons for the half-dozen existing gun owners in La Brea and the remainder, who may have little experience. Rifles in .375 caliber are the minimum in some African countries for hunting elephant. Bolt actions are available in the Los Angeles area and fairly easy to maintain. Ten millimeter caliber automatics would serve in emergencies with both hungry megafauna and hostile fellow inhabitants. Double barrel hammer shotguns with double triggers would be easy to maintain, intuitive to operate and offer a reserve firearm if one lock should  break. With the hammers down, the springs are relaxed so there is little risk of parts failure in the ready mode. Brenneke 12-gauge slugs have taken elephant and buckshot have been prescribed for African lion.
Double action revolvers share the same safe storage and operating virtues. The hammer need not be cocked to load, unload or check the cylinder status. While most writer suggest the .38 Special for new shooters because of controllable recoil and moderate revolver weight, I suggest the venerable .45 Colt. The big cartridge can be loaded with round ball bullets (146 grains) for training and defense from human attackers. This approximates the .44 Cap & Ball load used in the U.S. Civil War. Megafauna should use heavier bullets as the 260-grain standard load was intended to halt a cavalry horse. The black powder load was our most powerful revolver load prior to the .357 Magnum in 1935.
A few M-4 carbines in 5.56X45mm might also prove useful in trained hands.
Dr. Sam Veles would welcome some medical supplies such as bone saws, antibiotics and anesthetics.
Pioneer tools such as axes, saws and shovels may prove as useful as knives, swords and spears. Heritage seeds adapted to the Los Angeles climate would shortcut millennia of plant breeding. Domestic animals might avoid the cannibalism reported by the Spanish. A full size cow would be tough to transport but a milking goat just might be possible. I can't wait to see.