Everything you mention is dealt with at the page I linked Moshi.
David touched on the stars already. Here's some details on the hatch.
The Moon Hoax Debate
"The astronauts could not pass through the tunnel connecting the Command Module and the Lunar Module with their spacesuits and backpacks on."
Finally the hoax advocates are correct about something. Fortunately, the astronauts did not have to! Their EVA suits and backpacks were stowed in the Lunar Module the whole time. The only time the astronauts donned their suits and packs were when they actually egressed the LM for surface activities on the Moon.
"The astronauts could not have egressed the Lunar Module because they could not fit through the hatch and there was insufficient room to open the hatch in the LM. "
The hoax advocate who came up with this claim is badly misinformed. The astronauts were positioned on either side of the cockpit panel with the main EVA hatch between them. The hatch, hinged on the right side, swung inward to open, effectively trapping the Lunar Module Pilot (LMP) momentarily on his side of the LM. (There was plenty of room to open the hatch.) Once the Commander egressed, the LMP was able to close the hatch, move over to the left side, and exit himself.
As to the issue of whether the astronauts could fit through the hatch, clearly they could. There are many photos and video, both on the Moon and while in training, showing fully suited astronauts crawling through the hatch. There are a couple possible sources for this misinformation. First, early versions of the LM had a round hatch that hampered astronaut egress, however the original round hatch was changed to a rectangular hatch while the LM was still in development. Second, as I hear the story, a hoax advocate compared the width of the LM's hatch to dimensional data on the astronauts' spacesuit, or EMU (Extravehicular Mobility Unit). It was found that the published width of the EMU exceeded the hatch width. What the hoax advocate failed to realize is the EMU dimension was the maximum width measured across the elbows. When crawling through the hatch, an astronaut would draw his arms in under his body, thus decreasing his width and allowing him to pass through the opening.