Tub setups are generally better in warmer rooms, not so much for cooler spaces, but they do hold humidity better. There are tips and tricks that you can apply to a screen lid on a 10 gallon that will help lock in the humidity. One trick is to cover 2/3 of the screen lid with aluminum foil and saran wrap. Another suggestion is to lay a damp towel over 2/3 of the screen top, wetting the towel as needed and washing it regularly to avoid bacteria buildup. Again, if you do some reading in the Husbandry forum, you'll find a lot of useful posts, including walkthroughs on setting up a proper glass enclosure.