I am glad that you have already some ideas and information in hands.
Zephirin Drouhin is a real classic and I believe the reason to have choosen it is, it has nearly no thorn and it has very present fragrance.
However I must let you know that Zephirin Drouhin has soft, fine sterms and they really dislike afternoon sunlight. The strong sunlight fade off their cherry red petals. Zephirin Drouhin is more suitable for a site where you can have morning sun, and semi shade for their fragrance to travel around that corner. Besides, this species is very drought sensitive, they dislike dryness and it gives them black spot and mildew, all sorts of diseases that provokes by insufficiant water.
The container size you mentioned seem to be okay for climber, just make sure your soil drainage is good later when you plant your rose in. Container plant dislikes tape water (use rainwater as far as possible), and they do much better with some pine sheddings to cover their top soil to keep moist and cool. As in container, the plant get far lesser Aerobic Microherd and beneficial microbes activities, it is good to introduce blood meal after 2 months of plantation. Please be prudence with bloodmeal if your weather is very hot and dry, it might burn the plant if given too much during mid summer.
I am not living in USA therefore I am not in a good position to recommend you anything that is easily obtainable for you. When you look for rose, make sure you ask the rose nursery if it is a reflowering species too. Choose a species which has persistence colour to afternoon sun with good flower form that you can see their presence from far.
If you wish, you can code us a few of your selections and probably from there we can give you some information of your choices?
For any new roses planted, you need to protect them from their first winter to help them survive, no matter how strong is the rose. To protect them, it is really not very difficult. If you read up rose care on winter protect in the forum you will find a lot of useful tips there.
I am sure you will enjoy your effort in the year to come.