I do and it's a right pain in the (No Swearing Please), I'm not getting a car any time soon though. If you do, how do you do it?
I started off with two backpacks, one with pads and bat on my back and the rest in another strapped to the seat behind me but as well as being uncomfortable, it takes 20 minutes to get everything strapped up right . Now I just cram it all into one huge bag and bungee my helmet to the outside, and when it rains I cover it all in a black bag. It is MASSIVE, it's bigger than me and eventually it's gonna pull me off the bike in the wind.
I'm now thinking about having it all strapped across the seat behind me with the bat sticking it sideways, it's just going to take some practice getting it all strapped up.
Any suggestions?