Handlebar bags...

[freetour]

I'm planning on doing the Montana section of the GDR and some offroad
touring, too.  I'm looking for suggestions for a handlebar bag for flat mtb
bars that doesn't bounce all over the place.

[WesternFlyer]

I just installed a Nashbar bag on my cyclo-cross bike; Item No.NA-FTB.  There is a separate mini rack that is needed; NA-FRR, but in my case they sent the rack for free.  It is designed for mountain bikes with brake posts on the front forks.  It sits very quietly over lumps and bumps.  I don't think you could use it if you have regular size front panniers installed, but the rack might work.  It does just about everything a handlebar bag would do, but it sits just above the tire.

Western Flyer

[dombrosk]

I also ride with (semi) flat bars, and like my Arkel small handlebar bag.  They also make a larger bag, but I like the size limitation of having a smaller bag.  It still carries everything that I might want to take into a cafe with me, and has a very solid metal-to-metal connection.

[gregg]

Check out the Detours Metro Compact Handlebar bag which Adventure Cycling sells, also the Cue Clip (again Adventure Cycling) works great for holding your map. I used both on flat bars and liked them a lot.  

[freetour]

Thanks for the replies.  I'll check out those suggestions.