According to Palomino the weight for the 2910 is 3140 lbs. which may not include the battery and other items. That is 500 lbs. heavier than the Lance and likely do to their using less expensive but heavier materials in the camper's construction. That is 500 lbs. less stuff you can carry and not a camper I would be thinking about putting on a 3/4 ton truck without a lot of modifications to the springs, shocks, tires, and adding a rear anti-sway bar.
For winter camping I would want two batteries, which is an option for the 855S, and I would have the factory install the 95 Watt solar panel as it is likely to be all that is needed and easier than doing it yourself and trying to determine where it is safe to drill the mounting holes (any leaks can cause damage that is expensive to repair). Also the thermopane windows are a must have item. I would not bother with the factory microwave as they are less well built than what you can pick up for $50 at Home Depot or Best Buy and leave it at home when you are not around 110v AC so as to have more storage space for food.
Insulation will be important to avoid having the water lines freezing up and not being able to run the pump. We have the "4-season" version of the 845 which was the predecessor to the 855 and this has been a minor problem with extended stays in subfreezing weather. I would hope that this is better in the 855 models.
Be sure you have all the "extras" added into the price tag as "options" like electric jacks are not something I would want to do without. A luggage carrier is best done at the factory as they know where to safely drill the mounting holes.
Going into the winter no dealer is going to want a 2013 model year camper sitting on their lot and having to pay flooring for it for another 6 months. This is the time to deal and I would start with the base price and get a break on that and then another deeper discount on the "extras" which as options are grossly overpriced and where Lance and their dealers make a great deal of profit.
Consider that the model 845 that preceeded the 855 sold for $12K in 2001 and by 2008 was selling for $18K (out the door with options), and the 855 came out in 2010 at a $24,000 base price. We bought a very lightly used 2008 845 for $13K which included having the dealer add a new 9.3K btu AC unit. Other than having only one battery the 845 provides us all the functionality of the 855. Would we pay an additional $23,000 for a new 855S with the slideout - not a chance.
