Judy, the 2 day option is a wonderful way to allow people a choice, especially if they are continuing on, to do the Liberty. Staying onboard, allows for a smooth transition, less stress, and you can enjoy 2 more days with many of the gang, if you want. Having choices is a good thing
If you decided to do this, then getting a hotel between cruises is a mute point. If you come down early,the points or rewards you mentioned, in a previous post, will help you there, via the phone. Using Priceline etc is just a choice some will make, others will not.
Judy, doing what is comfortable for you, on a cruise, is what it's all about. Relaxation, when you want it, is another option for many of us.
Please enjoy anticipation of the cruise, don't get stressed. The holidays at sea, and the gang, will be a great de-stresser