Have you thought about making a electric drum set. I played around with some a while back using Piezo element from those buzzers. wire them into a jack plug.
Really simple to make the pad itself. Just a round disk of mdf , a metal plate and a rubber top ( i used a practise pad rubber, like the ones you fit over your set to keep the noise down)
Only thing is you need a drum box, which is fairly pricy but loads of second hand one around.
once you have these you can do what you like, easier to transport, and you can make your own drum sounds, and even hook it up to your computer sampler etc...
Travis
Ps just found this link
piezo drum link