So, just as an update. I went out and unwrapped my H23 over the weekend to prep for spring. I took a good look under the floor boards. There is a small hole that is drilled between the keel area and that under floor area below the cabin step. I believe that is supposed to release any water that might have collected under the floor in that region. So, unless the hole is plugged... I don't see any reason to cut into the floor.
My boat has that same hole, but because it's so small, and it's only in the middle, there was still a ton of water in there. My problem was that I could dry out the bilge area, but then there would be water in it again 30 minutes later. I cut the hole and sucked the water out of that area and now the bilge is 100% dry.
If the bilge area is complete dry on your boat, it probably doesn't matter anyway, but if there's always a little bit of water in there, it means there is ALOT more water somewhere else.
Alternatively, you might want to consider drilling that hole out larger, so that more of the water in the interstitial space drains into the bilge.