Congrats on finding the 347THT. I have the 2011 and a friend has the 2010 model. I got mine with dual pane windows, slider awnings, fireplace and free standing table but did not get the generator or second air.
I use the Harbor Freight MC chock and it works well for my Goldwing.
I use a Honda 3000eu gen, and the Pullrite 16k slider on a 2004 Ford F350 crewcab with the short bed. I have had to replace the hitch under warranty as the slider pin sheared due to pressure and angle I believe. Pullrite covered it but it was obvious it was probably my fault.
I love the trailer, and have been from Colorado to Florida up east cost to NJ and back to Colorado via Michigan for a few weeks. Trip took about 3 months and I did have a slider issue and a bold coming up thru the floor in the dinning/kitchen area. Both fixed under warranty and Keystone was very helpful in taking care of everything. Did have major issues with the time it took Lazydays RV in FL to just do the slider work, (5 weeks) while visiting family but still love the trailer.
No heat vent in garage area but easy enough that my friend put a vent in his as the room can get cold.
Enjoy your new toy.