Fuge with no baffles?

Does anyone think it would be a problem to have a fuge with no baffles? I do not plan on running a ton of GPH through it. The reason I ask is I was going to use a 29g but only a 20g long will allow my skimmer in and out. I have 80 lbs of Sand for a 20L!! If I split it into 3 chambers I will have a pretty small area for sand, and it will be short. My skimmer produces hardly any bubbles at all.
Also, my skimmer is a HOB so it could stay on the display tank if that sounds like a better idea.
Your thoughts?

One area for return pump should not be a problem. I am just trying to max out the DSB area and my skimmer would eat up 8-10 inches. I will be doing DIY EPDM baffles so nothing will be carved in stone.
Perhaps a combo of your ideas....A wall just a couple inches above DSB level and eggcrate up against it adding a bit more height to contain macro.
If this is what I go with would you leave the skimmer on the main tank? Thinking of pods of course.

Here is my first effort. I used one solid baffle and another with tons of holes, half way up, to act as the egg crate that was mentioned. As of right now it has a PH inside just moving water around like a closed loop. Tomorrow I should get the rest of the plumbing items needed to install the return pump and make it function. :headbang2:

I had to modify my stand to get anything over a 10 gallon inside. I knocked out the rear support and built a frame around the tank to take the weight.

Here are some pics. I probably should have turned off some lights so you could see better.