I would never leave lenses attached when you are not shooting. The movement (even if secured well) can loosen the mount and cause considerable damage.
I had a similar question and tweeted it to ThinkTank. They replied with their suggestion and posted it to their fan page and I got a number of suggestions.
THINK TANK PHOTO | Facebook
I would post the same question to their fan page and also take all the gear down to Houston Camera Exchange and try putting it in a few different bags.
I always suggest trying the Think Tank bags first, though.