Personally, I cannot lift for my lower body in season. The training load it puts on your legs makes it hard to do a lot of high quality work on the bike.
I'm willing to bet that most racers do not do signifcant lifting for their legs in season. Obviously Gsteinb has been at this a long time, and what he does is working for him, however.
As to the OP, with your weightlifting background, I doubt a lack of muscle strength in your legs is going to be your limiter. If I were you I would focus my efforts on the bike, do some core work, and skip any weightlifting involving your legs until next off season.
__________________
You could fall off a cliff and die.
You could get lost and die.
You could hit a tree and die.
OR YOU COULD STAY HOME AND FALL OFF THE COUCH AND DIE.