Lance is the top of the line and if weight is an issue then Lance Lite would be the way to go, I have a 10'6"on a 3500 Quad cab 4x4 SRW Dodge it handles it fine, if you want to do a lot of off road go smaller, mine is made for comfort
Most camper come with air, if not it will be wired and set up for it, check for leaks around the front window, I just bought a new to me 2003 Lance it's great one of the best manufacturers, you might ask your questions at Lance Owners.com
I rode my DR to Copper Canyon in Mex with 2 WR's, good for shorter, smaller rider, plan on shifting a lot and at highway speeds heading toward their max RPM which is 11,500, how long do you think a motor running at over 9000 RPM will last
The 690 has no subframe to carry panniers and the gas tank is in the rear under any luggage you have on, they need 91 octane and with water cooling and fuel injection are very complicated, how about a DR650 great for most conditions, simple air cooled and carb,tons of aftermarket parts, (mine is...
If they are aluminum just pound them straight, I had Tourtech zegas on my DL1000, ran into the back of a KTM950 that stopped for no reason in the sand right in front of me, bent the crap out of it, I just got a sledge hammer pounded it out and it was fine the lid even sealed
The Artic Fox camper are rated very light from the factory, with a necessary added package they weigh about 500 lbs more and add your gear figure about 1000 lbs over the advertised weight, my old Lance 9'6" is about 2800 lbs plus gear I've done Baja with it but slowly off road