The forms and spreadsheets are actually quite easy. You just need an account with Google Docs and you can create the sign up and score tracking sheets in just a minute or two once you get the hang of it.
You don't have to go completely overboard like I do with the graphics and such, because those tend to be the most time consuming parts and ultimately aren't really necessary. Thankfully, I have an art department (Jarid), but a simple spreadsheet and forum thread can be just as successful as all the hooplah we put on. KISS (Keep it Simple Stupid) is the best way to go :D
It can be a decent amount of work depending on how big of a show you want to put on, but you learn to how to work more efficiently as you progress. That's why I recommend starting small. You can sort of gauge your own interest that way. You may find out that you like participating in events a lot more than running them yourself.