The crown is indeed pretty limited. I guess if dropping the bed, raising the standard and using the limited tilt doesn't cut it for you, you could make yourself a Rube Goldberg lensboard with some tilt built in. Okay maybe not! I've thought about that or just modifying the tilt mechanism on mine to allow more... it's worth thinking about such things because (as you know) these cameras are very light and fun to use and if you drop 'em, oh well.
I am becoming more and more enamored with a 6x9cm camera, a horseman VH, which has far more extensive movements and uses rollfilm, so it's great for travel. You can use ground glass or an angle viewer. It has a rotating back and can also take all of the mamiya RB backs, that's a nice bonus. I haven't weighed it but it feels about the same as a crown but has far greater capability, and there is the VH-R version as well, with a coupled rangefinder if that is important to you. I am slowly shifting more toward the VH because 4x5 isn't really big enough for contact printing anyway, so the difference in size between 6x7 or 6x9 and 4x5 isn't really a big factor for me. I mention this because, personally, if I were off on a big trip, the VH would definitely go with me, rather than a 4x5. Well, a 4x5 with a 612 back sure would be nice....