Powderpost Beetles
I had rather suspected that your RV was pretty new. Because of the size of your exit tunnels, you are seeing true powderpost beetles. They are generally attracted to hardwoods. Some species are particularly fond of hardwoods, generally oak, ash, walnut etd. Others go for softwoods. They They seldom lay on wood that has been finished, so the infestation took place before the manufacturer got the cabinet. They can, however, emerge from 1-5 years after the eggs are laid. I would suggest that you go to your manufacturer and get the wood parts replaced on warranty. The cabinet manufacturer's wood supplier is probably bottom line responsible. If your dealer or manufacturer denies that the wood was infested when you bought the RV, call the state university extension entomology or wood technology department. A link to a publication from the Purdue entomology department is attached:
http://www.entm.purdue.edu/entomology/ext/targets/e-series/EseriesPDF/E-73.pdf
In answer to kitfoxjh, they are usually recognized by their exit tunnnels, often with small piles of powdery frass around or below them. The adults are not very obvious and are usually only active at night, so are seldom seen.
As far as the ladybird beetles are concerned, they are probably adults coming out of winter hibernation. They will be gone soon unless you have plants in your RV that have aphids on them, or are in an area that is loaded with aphids. Bay leaves won't do anything for ladybird beetles or any other insect that I am aware of. If the beetles become intolerable, a can of Raid is your best bet. If you wish to go organic, I have seen some spray insecticides that use pyrethrum as an active ingredient. Pyrethrum is made from a plant in the daisy family. It should knock them down quickly and it is somewhat repellant to a number of insects.