Southern Lousiana (along Route 90)

In late March, we are headed from Surfside Beach, TX to Biloxi, MS, but we have like a week to make the trip. Our plan is I-10 to Rt. 90 through Southern Louisiana. I lived in New Orleans for 3 years, but that was 40+ years ago, and I doubt things are very much the same.
We are looking for suggestion for campgrounds, restaurants, and things to do along the way. We travel with 2 dogs, so like dog friendly places. Like historical places, waterfront, dog friendly Mom and Pop bars and restaurants, etc. We are not interested in shopping ....

Thanks!