How can I get mv (or the * wildcard) to move hidden files?

You can do this :

shopt -s dotglob
mv /tmp/home/rcook/* /home/rcook/

You can put

shopt -s dotglob

in your ~/.bashrc if you want it to be the default.

See http://mywiki.wooledge.org/glob

Another approach to copy the dot files:

mv /tmp/home/rcook/.[!.]* /home/rcook/

Don’t use the pattern ..* as it matches .. (pointer to the parent directory). If there are files whose name begin with two dots (..something), also use the pattern ..?*.