I free roam my igs in a weekly basis to get all of thouse sweet sun rays. Now I have some thoughs to ad to this tread. First I dont recomend free roaming a small, medium snake, let alone a ribbon snake outside of some kind of enclosure to contain it, how much do you guys want to bet that buddy Squeletor here will be back in few days saying "dang I was just free roaming my snake, he was so calm so I relaxed a bit and now its gone, how can I catch it again outside?"and that pretty much says it all, by doing that there is a very high chance that in the blink of a eye you may lose your snake. Also didnt you just a few days ago said that she was finely starting to eat again after she had a hunger strike? Now why stress her by the extra handling and constant change of cenario? If you want to put your snake outside you need to build her a outdoor enclosure. And second I dont recomend free roaming a leopard gecko, leo geckos are very sensitive to some patogens frequently founded on the floor, specialy criptosporids which can become in cronic debilitating desiase or even kill a gecko. Also many leo gecko morphs lack the protective layers of melanine wich makes them sensitive to even low levels of uv ligth.