I guess its depends on what smell you re trying to get rid of.The new trailer smell is the formaldehyde,the best route for that is to put out little cups of ammonia and let them evaporate.they will neutralize that new trailer smell.with that being said you need to air out the ammonia smell for a day or two after doing this.We cooked fish inside the last trip out this year,that smell seemed everywhere which made washing the walls down necessary.We used lemon Mr. Clean for that.We like Febreeze for the fabric and Neutra air for other stuff. as far as regular deodorizers I think its whatever you like.Also we use clorox in the tanks and be sure to put the stoppers in your sinks tubs and such after you winterize it helps slow the evaporation of anti freeze in the P-traps and keep the vapors down if it all does evaporate