Also, those 6x points don't normally have 1 for 1c value. Usually it takes 25K to 30K for a $100 or so room. Though, I scored two nice days at 12.5K each in Los Almos area, likely due to occupancy being down due to a large fire that had closed the Natl park the week before my arrival. That worked out great for me and my travels. So sometimes they are 1 for 1c.
Right now I am using Chase AARP card which gives 5% back on everything for 6 months. That is very hard to beat with anything other than promotional bonuses on other cards.