Dear Neal, as Skiploder wrote, if you read your first post you have to assume that it would be possible to keep Gonyosoma in a terrestrial setup. I just wanted to correct this and to make sure that no beginner with Gonyosoma might get the impression he might keep them like a hognose after all. After straighten this out, I think this issue is solved.
@Bugmom – the size of your enclosure sounds good…
Roman