You can also bank and borrow your 50 add-on points so that you would have 100 points to use at the 11-month window every other year or 150 to use every 3 years. You could also make part of your CRV reservation at 11 months using your CRV points and then try to add additional days using your SSR points at the 7-month window. That is riskier of course because there is no guarantee you will be able to book those additional days at 7 months out.