Yes you can, You only need a cc on file if you are going to use the charging privillages
on your room key. I have checked in and just show I.D, done.
btw I reserve a room online, pay 1 night rate(deposit) with a cc. Then I send them a check
when I can to pay for the room . been doing this for several years now.
also the card you use to reserve the room with, doesnt have to be the card you pay
the final bill with. they will ask if you wish to put the charge on that card, as it is already in
their system, but you can pay with any card the accept,cash travelers checks etc.