First, the rattling: It is a house going down the highway. It is going to rattle, no if's, and's, or but's about it. How much it rattles depends, generally, on how you maintain your unit. All the windows have "anti-rattle" strips at the top and bottom of the window tracks. If you allow yours to get torn up, split, worn down, etc., you will get more rattle. If your anti-rattle strips are in good condition, you will get less rattle. The other common area people complain about rattling is in the stove. The stove grate is held in place with rubber stovetop grommets. If these grommets are worn or missing, you will get more rattling. Also, how you pack your RV has a lot to do with the noise level. If you pack your dishes on top of eachother, they will rattle going down the highway.
So, to answer your question, the noise level really depends on you. If you are expecting it to be as quiet as a library going down the highway, then an RV of any kind is not for you.
As for operation in colder climates, the main challenge is your water system. If you get much below freezing, you need to empty your water system to prevent freeze damage. This results in loss of sinks, shower and toilet.
Hope this helps.
