Being an aluminum boat gives plenty of room for modification. So any work you want done to it can be done for the most part. If you are going to put plywood down make sure you use the marine grade stuff with marine grade hardware.
As for people on the bow a boat that narrow (66") is only meant to have one person on the bow at a time. Its not a wide flat deck like you get with bass boats or other bow fishing boats. Putting too many up front gets risky and i dont recommend risking life and crew on the water.