Thank you very much. Just after I posted this, I found instructions telling me to run
setenv PACKAGESITE ftp://ftp-archive.freebsd.org/pub/FreeBSD-Archive/ports/amd64/packages-8.3-release/Latest/
at which point I followed the instructions on the original instructions and everything installed. Thank you very much for the answer!
/random when i rebooted, I'd told vmware to conenct my VMXNET3 adaptors, and to NOT connect my E1000 adaptors - instead it connected the E1000, so I shut down, removed the E1000's, and booted back up with JUST the vmxnet3's connected and it worked. in case anyone else tries to do what I did and hedge their bets by having both adaptor types installed at the same time :)