I'm in the market for a decent multipiece baitcasting rod. Anyone have any thoughts on a MH or H power 3-4 piece that might be suitable for smaller tarpon, cudas, snook, etc?

I don't know what kind of rod is used for the species you mentioned, but I have a couple of Browning Safari travel rods, and I'm very pleased with them. GLoomis and St Croix both make travel rods too, but I have never used them.

I am also going to be in the market for a two maybe three piece. Going to El Salto in the spring and not sure what I can carry on the plane.

I've heard good things about the Cabela's XML rods.  They have several "pack rod" models available.

http://www.cabelas.com/product/Fishing/Fishing-Rods/Casting-Rods|/pc/104793480/c/104764680/sc/104823180/Cabelas-Fish-Eagle174-XML-Casting-Pack-Rod/703465.uts?destination=%2Fcatalog%2Fbrowse%2Ffishing-fishing-rods-casting-rods%2Fcabelas%2F_%2FN-1102351%2B4294967225%2FNe-4294967225%3FWTz_st%3DGuidedNav%26WTz_stype%3DGNU

I use the Shimano voltaeus 2 piece rod with a pinnacle solene reel....Its worked wonderfully so far..