kmalone said:
If you have room, you may like having a mobile option. Most of my assembly is done on the tablesaw outfeed table, so it is pretty handy to be able to bring the clamps up close.
+1.
If your shop is relatively large or spacious, imagine the time or trips you save from walking from your assembly station to the wall(s) where your clamps are kept, and back after the assembly is done. Sometimes for a complex glue-up, I could be handling 30 to 40 clamps or even more at a time. I just roll the rack of clamps twice for any assembly job -- once to the station at the beginning and once back to where the rack is parked. Replacing the clamps can't be easier.
I do have a wall for clamps, but it's for the longest, heavy parallel clamps (6' and above), which aren't used that often compared to the F-style clamps, aluminum bar clamps, etc.
Another benefit of a mobile clamp rack or stand by your bench/assembly table: If you run out of a clamp in the middle of a time-sensitive glue-up for whatever reason (yes, it has happened to me more than once despite my dry-fitting routine), there is no panic!
For F-style clamps and smaller/light weight clamps (spring clamps, handscrew clamps, C-clamps, etc.), the footprint of a mobile clamp rack can be pretty small: One of mine is 8" x 36".
You can build or buy depending on your needs. The other day, I saw a metal mobile full size clamp rack listed on Kijiji for $60 Cdn (I think new is about $120).
Edit: I have only one small section of a wall free for long clamps. All other walls are taken -- by either wall-mounted cabinets or shelves.