The problem is getting this era clear enough to be "fact". Company changeover so messy and not fabulously well documented.
The Camco name was sold to Hoshino (Tama) in the late 70s. DW got all the toolings. Hoshini made some drums under the Camco name apparently using Keller shells (according to a tertiary source quoting Tom Hoshino) around 1979 in Pennsylvania. Camco had ended it's time in Los Angeles using Jasper shells. Some of these Hoshino shells had re-rings, others did not.
Hoshino also made a so-called Renaissance model under the Camco name which had inlay/intarsia on the shell - shells that looks precisely like Tama's Artwood series except with the Camco knock off lugs. These were probably Japanese and birch - not to mention very beautiful. There's also mention of "rock maple" shells though this appears to have been a Tama catalogue error - it seems to have been only a maple veneer.
I've seen three different types of badges on these drums - a copy of the cloud badge you'll see in the Elvin Jones kit, the tombstone badge and I've even seen the Tama badge on drums with the Camco-like lug.
All this happened, as far as I'm can tell, within a 12 to 18 month period 1979 - 80. Because there's so little clarity and consistency I think a lot of people are a bit wary because, unless you really, really know this stuff (and there can't have been that many made during that period so not much to compare with) you're not entirely sure what you're getting.
Throw in the horrific entry level Camco by Tama stuff that came out about ten years later and the legend was well and truly besmirched.
If you do a search through the archives here for either Hoshini or Pennsylvania you'll find a few of the threads about this much debated - and still pretty unclear - period of vintage drum history. A few people have scanned stories from the time referring to Camco moving to Pennsylvania whereas, I would argue, it was really just a purchased brand name moving to the Tama operation there.