Good ideas, and as a travel trailer guy I can't really give good advice on A vs C features, but maybe I can help with what we did buying at Hershey.
Be prepared for sore legs the next day from climbing in and out of so many units. To avoid some of this make a list of must haves and nice to haves and talk to a rep at each manufacturer and ask to see only units that have the must haves and most of the nice to haves at your price point. Or plan on hiring a message therapist and spending three days to fully check out all the As in the Giant Center lot.
Dukes in Hershey is a good meal at a reasonable price when you're done looking and want a place to organize your thoughts before you forget what you saw. Fudrucker's has great burgers too.
Rig: '16 XLR Hyper-Lite 29 HFS > 2014 Nissan Titan Pro4X 5.6L
Toys: '08 HD Screaming Nemo Ultra > '07 HD Dyna Street Dori
Family: DH - JC, DW - Malinda, DD - Sparky the Wonder Chug (Chihuahua & Pug)
Days Camped: 2016 - 22 (+13 reserved); 2015 - 27; 2014 - 16