Junk in the trunk (and rust, and carpet, and foam, and glue...)
Note to fellow noobs: you need a catch-can for the gas when you drain it - that's obvious. What's not obvious is that there was way more gas than I anticipated when we drained it. My advice - use a container that's obviously too big, because you'll want margin in case your ability to estimate the volume of gas based on 'slosh' is as bad as mine.
So take a look at how we did the gas tank removal, and our first look at the horror that's hiding in the trunk.