The NCAA web site has a list of baseball schools for each division. Googling "NCAA D1 baseball schools" pulls it up as one of the first 3 or 4 links. BUT, the page seems to be down now. The same search will also get you a Wikipedia page and a couple of other sites that list schools with D1 baseball programs--not sure if they are 100% accurate, but should be close. (Change search to "NCAA D2 baseball schools" etc. for the other divisions.)
There are a few sites that list camps, but I haven't found any of them very useful (and they are far from comprehensive), so I'd love to have a good source for your second question.
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