best ways to inprove wake in an I/O

I own a 20ft. crownline. ot already has a tower, all i need is a wake. I have herd all sorts of things about sacs and so far they seem my best bet towards a bigger, solid wake. I would like to know the best set up to get the best resulsts, how much weight, and wear. If i add a bunch of weight in the front or ski locker is that going to make the wake steeper, or placeing more in the back. what is beter. a combination of both. is there anything else other then water balest systems, or sand bags and lead weight which i realy don't want because they always take up space and i also like to ski so i don't always want the wake. can you put a wake plate on an I/O or is that impossible. Please give me sugestions and feedback on what you have tried and what works, and doesn't work.
thank you