Your first 30 seconds should wow them with your both your camera AND editing skills. Is your current reel that good? If so, use that and yes, mention you have a longer reel.
If someone calls you up and ASK to see your reel, you probably can send both, noting which one they ought to see first. But if you're using your reel as a PR tool, you're better off wowing them and leaving them wanting more. The idea is to get them to start a dialogue with you so you can sell yourself.
Good luck!