I have Key-less entry on my house, my truck and my garage. I've looked at these a couple of times for the TT, I think I even found one with a remote (more things to loose).
We broke a key off in the dead bolt as we arrived at the CG on the 4th of July weekend, found out how easy our Highbrid is to break into when the door is locked
I bought a lock box that uses a combination to open, it has a steal cable tether on it, and I lock it to the steps when we go for bike rides or hiking/swimming. We can easily change the combination on it, and I even keep the TV keys in it.