Agree 100% with Neuro's assessment. In my view the only regret you will have is not having proper support and watching the big glass hit the ground. I have used the Wimberley WH-200 and it is very nice. I personally have the same RRS setup as Neuro describes, with the only difference being that I have the TVC-33S (the S stands for "short") which I prefer for travel convenience.
I'd definitely go with the 3 section' studies, especially this is new to you. I have no trouble getting my Gitzo 3530LS 3 section on board a plane even a regional aircraft.