You could just heal them in temporarily until you're ready to plant into the final location. Heal them into your garden somewhere by digging a trench large enough to accomodate all your roses and lay them into the trench on an angle, then cover with soil. The soil needs to be kept moist, and they should be well covered, leaving only enough evidence so you know where they are when you're ready to plant. I have kept fall ordered bare root plants this way until the following spring and they are just fine.
The pot suggestion is good too. But, if you put them into a pot, then they should be well rooted when you plant them, otherwise, they are still essentially just bare root. You don't want to keep bare root roses in a warm location. You don't want them to freeze, but they should be kept in a very cool location. JMO. Good Luck!
One of the most delightful things about a garden is the anticipation it provides.
W.E. Johns, The Passing Show