I'm not sure why one would want such a big power hungry printer when
camping. A nice compact printer to have is the Canon IP90 or its
predecessor the I80. You can get clip on battery packs for these that
will run for 6 hours, and a bluetooth interface so that you don't
have to deal with any additional cables. Works on Windows and Macs.
You can print photos with 'em too. When not in use, stick it in the
bottom of your closet and you won't even know its there.