Most of the closed towers will be no problem. But, Danbury, CT, may be an exception. I have not been there lately, but before they got the tower it was nearly impossible to land there on a nice Saturday or Sunday. The pattern was a continuous circle of planes doing T&G, with no spaces to cut in. One had to just barge in and cut someone off.
Of course that was before general aviation hit the skids. Maybe it's deserted now.