Thank you. The adapter bolts on and retains the factory spark arrestor. This adapter I purchased on ebay. It is stainless steel as is the elbow that I used. I think most of the time I use this generator sending the exhaust up will be a better choice for the locations that I plan to use it. If I get a little more sound reduction...that is a bonus
I bought mine because on one camping trip, with friends, we had a glitch. My buddy and I were out all day paddling in the rain. My wife and his wife (bud was tent camping) were in my FWC out of rain. Here in TX hot and muggy so they decided they wanted AC. They could not pull the Honda to get it started. Researched and saw the Smittybuilt was elec start and remote start. Bought and have not looked back. I REALLY like being able to fireup and use until sleep time for AC and such. Then while in bed I can use remote to turn off without having to get up and go outside. One big drawback is it's bigger and heavier but not that bad. FYI as recommended by a friend I fire-up my gen sitting at home every couple weeks if it has not been used. Those little gen carbs can gum up if not careful. I know Honda has a mod that allows you to run all gas out of the system for storage I wish I could figure one out for Smittybuilt. Now that it's cool my gen does not get used 
I am right there with ya on the electric heat for the interior. Mine uses a Zerostart cabin heater. Plugged into shore power it keeps the windows defrosted and ready to go at a moments notice. Important for a first responder. I can use it for camping too if I need to. A little 900w generator will run it.
AC is a different story. I went with this one: Champion 3400 dual fuel.
2000w was not quite enough to run the portable AC unit when it is hot outside. It was working it hard when it did run the AC. The 3400 doesn't work hard at all. Better to be a little over sized for the demand , than undersized.
It is electric start. Should not be too hard to add a remote start relay If I needed one.
I added an an adapter , elbow and muffler to direct the exhaust upward. Works great and quiets it just a little more.
I have had good luck with Champion. Our back up power for the house is a larger Champion. It has been a great back up power supply for years.
We like the Propane option. That is our back up plan fuel. That made the dual fuel generator our choice. Given your needs how about this one: Champion 3100 w/remote start
Notice that it has the correct RV 30a plug for a trailer connection. That is nice. No adapters