Picking up new Cougar 333MKS 5th wheel tomorrow

I would suggest airing it out with fans and baking soda for the whole week before you go. Our cougar had a terrible smell when we picked it up. Gave me terrible headaches. I hope you aren't as sensitive as me. Took us a full four weeks of airing before we could use it. We also were surprised how much more movement there is in a fifth wheel than our TT. You may want to consider X chocks and king pin stabelizer if sway bothers you. Hope you enjoy your new rig.