Burl,
The gray globs are hardened enough so rolling is not a problem. If I didn't have a partial roll of EB tape sitting around, I don't know if I would have bothered. The tape has a shelf life, which made it more worthwhile to use it before it gets too old. I did have gaps that needed to be addressed one way or the other, but I could have done it with Dicor. OTOH it would have been very tempting to buy 20 feet of 6" EB tape on ebay and just do it anyway. (EB tape is quite difficult to work around the curve of the roof, as my photos testify to.)
I cleaned the roof and caulk with soap and water and a scrub brush as the first step. I was really amazed at how clean I was able to get it that way.
Yes, I would remove that bump out thing. It's just screwed to the wall as far as I can tell. I think its true purpose is to move the sofa over so it meets the dinette to make that big bed. I'd love to start the bed project right away but I'm burned out from all these mods and fixes I've had to do. At this point I feel it is good to go. We haven't even camped in it yet, but we are hoping to head south for a quick trip in mid month.