Remodel insulation

Hello,

I am currently doing a remodel from top to bottom of my travel trailer and after opening the walls and repairing all the wood rot and leaking areas, I have done the electrical and plumbing. Now it’s time to do insulation but I wanted to see what peoples opinions are on the different types. I’m aware that closed cell spray in is the most expensive but is it worth it? Is rigid foam board better? Initially I was just going to do spray foam for both the walls and ceilings but after doing research and reading conflicting opinions I wanted to see what other people’s thoughts are.