I personally think it looks naked without double the L.
Nope, nope, nope. With two l's, I want to say it as "trav-ell-ell-ell-ing"...
Hmm--if I had started that sentence with, "With two ells, I want to say it", would you all have understood me? (Uh oh, there she goes thinkin' again--always a dangerous activity.)