Beveling bulkheads

I also recently started beveling my BH's and transom since they are all glued up. Despite my initial fear of beveling, it is quite easy, even for a beginner. I mark the edges of the BH first and draw a line for the bevel, and then on the face that is to be beveled I draw a line connecting the two edge bevels. That way, I have a nice visual of what needs to be planed off. Here's an example:

Here's a side of BH1 all beveled up:


BH 1 and the Transom are easy to bevel because all the frame pieces are on the same side. I am running into problems on BH 2 and 4 because I need to make bevels but can't get my plane to the end of the BH because a frame on the opposing side blocks it. This is frustrating. I glued everything up as I was supposed to, minus the side frames that are added after the boat is glued together (this is me saying to the skeptic: I read the directions and followed them to the T). In retrospect, I feel like I needed to piecemeal construction of the BH and bevel a piece at a time. Here's an example of the problem on BH4:


Above is BH 4, looking along the bottom edge that is to be beveled. The bevel drops from left to right, so the high side is on the left. The side frame in the distance will block the plane from finishing the last section, unless I can get a bevel on the side frame. Then plane should pass over it no problemo. Here's another example but on a side frame now:


So this is looking down the side of this particular BH. I have marked the bevel I need on the side (2mm) with the continuation on that bottom frame. From this perspective imagine the plane is coming down the side of the BH towards you, the viewer. As you can see, it will be blocked by the side frame unless I can bevel that too. I don't know how to easily bevel this so I can bevel the rest.

UPDATE: Someone over at the Storer forum mentioned a few options, of one them being a rasp. I took care of this problem in 5 minutes... my brain's just not working today. There's a reason I'm not at work!