Industry in the Lake Charles area is booming, and they are building "rv parks" for the contract workers left and right, I know of at least 4 that have opened in the last 6 months, some have a dozen sites, some may have a couple of hundred, and they are all mostly full. One of the nicer ones in the Lake Charles area is Little Lake Charles RV park (formerly a Yogy bear park), I have not been to it lately, but do know they have spent a good bit of money fixing it up (or at least making the entrance look fancier with wood pilings and nautical rope). This one is about 2 miles from I-10 north of I-10 at exit 36, then down a side road about a mile. Another option west of Lake Charles in Sulphur is A Plus Motel and RV park, don't let the name fool you it is an RV park, but is in the heart of all the new industrial development so may be packed with contract workers.
p.s. when going through Lake Charles, take the I-210 bypass to avoid the old I-10 bridge which is one of the steepest and oldest bridges on the interstate highways system (built in the late 1940's), the I-210 bridge is still a bit steep, but was built in the 70's so is much wider and better.