Can't do time travel (this setting leverages the setting of my 2010 Hugo-winning novella "Palimpsest": I already went there)
Jungle planet: I have plans.
Marooned in the void: kinda-sorta going there if by "marooned" you're willing to give me "got stuck somewhere electronics can't work". The setting is already mind-numbingly huge, don't need to dump the Bootes Void on it.
#EESmith gives you huge latitude on what counts as marooned, so you're alright.
In the #Skylark series one case was being so far across the universe that the mounting platform for the comms array had to be the size of a planet in order to damp vibration to the point that the beam wasn't wobbling across entire galaxies at the receiving end.
In the #Lensman series one case was being in a different universe where the speed of light was huge, and another was being so far across the multiverse that only True Love could locate which universe Our Hero was in.
Smith was all about going bigger in the next novel. (-: