It can be done, and fairly easily I might add. I have actually done a single bucket in the back and I left the other side open for a cooler, tool box, etc. Whatever I needed to bring along. That gave a ton of room for spares and stuff you'd need on the trail too. Then I just took my seat, drilled holes and bolted some small square stock to the stock seat mounting points, then drilled the holes for one side of the seat to mount to the stock bench bolt location. On the other side of the seat the wholes obvisiouly wont line up so I welded one tab to the square stock that would reach to the seat belt hole. Then I just drilled another hole in the back of the same side of the square stock and through the bottom of the tub and used a bolt and nut. Then your seat is bolted in at 4 points and its not going anywhere. Fitting 2 seat would be more tricky for sure but Im almost positive that its the lowback CJ seats that you can get 2 of them to squeeze in there. I have seen a write up of someone do 2 like that but I can seem to find it. Just get the measurements of the width of the inside of the wheel wells in your tub and how wide those seats are and see if they'll fit. Hardest part is just makin the brackets yourself which, in all honesty, you might be able to jsut buy some and just drill some holes. I just wanted to use as many of the old holes as I could and I only ended up needing to drill 1.