Given Titan's atmosphere and temperature, I'd think all you'd need was a warm air balloon! Pity we won't have a chance of this being before 2020.

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We want our children to go to the planets. Burt Rutan 6/21/04 K.I.L.L. S.M.U.R.F.S.
Tuckers! Automotive Oddities! Building my hot rod with the help of the intarwebs Those who would delay scientific progress for a little temporary prosperity shall have neither. MachineCast Save the planet, by leaving it! "To be second in space is to be second in everything," LBJ.