Oh yeah. I forgot the DNA disease. But would that really matter in the short term? In that book, he was still quite potent. Though he was near sighted, the introduction of new DNA may have averted this. During a two hour time persiod, ther effects shouldn't be too bad. Just don't go nothlit, or the disease will take its toll.
Just try to grab Gafinilan's tail. Mertyl's arms because five beefy armed Andalites will make the Yeerks (or at least V3) suspicious. Mertyl or Ax's eyes, or mix both. And mix in all three fur/hair colorations.