I believe I have figured it out with your help. I'll try to explain it here.
Highways will cease to be a singular magazine Feb 2014.
If you are a good Sam member, you'll get the Highways content in four, quarterly issues of Trailer Life as inserts.
If you subscribe to Trailer Life you'll still get it as usual, and, quarterly, you'll have the Highways insert in your TL as long as you stay GS member.
My email from GS.
2013 Rockwood 8282WS
Reese Revolution Pin, Reese 16K
2008 Tundra Limited Double Cab 5.7L
Air Lift 5000 w/Wireless Air