Nope, those are all the places in the game! ^^ It's pretty much just the camp. Sure! There are five endings in total. Two of the three you're missing, the Bad Ending and the True Ending, require you to play the game multiple times to get all of the aconites. Then how you respond to Tempeststar dictates whether you get the bad or true ending. The third ending, the "Neutral Ending", requires impatience :') I hope those hints were helpful enough without giving everything away!
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Yes, the Neutral Ending is the speed running one! For the True Ending, it does need you to click on the ending screen to continue to the true ending if you have the proper requirements ^^ If it's just black, then that's simply the end of that ending and not the True Ending. There are about five aconites, so make sure you've got them all!