I'll be travelling to CO in few weeks and wondered if anyone had any ideas on temporary/portable security alarms they use. I have a disc lock and a 6ft. kryptonite cable that I plan on connecting the two other bikes going with me to mine, but I was curious if there were any portable alarms, something to make a noise if some tampers with the bikes. Are they Xena disc locks with alarm any good? Anyone using one? I'm mostly concerned with our hotel stays, so anything would be fine.