Opinions differ on soil prep. If you have good prairie loam, no amendment is needed. If you have clay fill dirt, I would dig the whole planting area uniformly to a depth of 10"-12" and incorporate 3" of compost. Fertilizer may added from the top after the plants have settled in. Follow label instructions per sq. yard, or if given per plant, spread that amount over at least 4 sq. ft. Over-concentration of fertilizer can kill a plant. I usually give half doses or less the first season.

Prune next April by removing winter-damaged wood.

Most Buck roses can be spaced about 3' in zone 5, some 4'. Consult HelpMeFind.com for the expected size, or maybe someone here knows.

I'm curious about which ones you have on order. Some Bucks will require much more spacing than others.
-terry

Yes, you should dead head them after they bloom. For one thing it makes the plant look neater but it will also encourage new growth and rebloom. As to how to do it the rule of thumb is to cut just above the first set of 5 leaves. But you don't have to. A lot of times I just snap off the spent bloom right below the hip. Other times, if a plant is getting out of line, I'll cut much deeper to keep the plant in the shape I like. Any way you do it you should always make your cuts just above an outward growing leaf set. That is the point from which new growth will begin. And cut at about a 45 degree angle to keep water off the tip. And remember that any pruning always encourages new growth. In your zone you should stop pruning at least 8 weeks before your first frost to allow all the new growth to harden off before winter sets in.

Ideally, get a soil test via your county agent (county cooperative extension aka ag extension).

Soils that are dark when wet contain either lots of organic matter or lots of silt.

I grow Distant Drums, had 2 but lost one over the winter a few years back. I think it may be one that isn't as hardy. I also have Country Dancer. It has thrived and is about 4 foot wide and 3 foot tall right now...It is about 8-9 years old. Most of my roses are grafted and I plant the graft deeply (got that great advice here). I have around 75-80 roses. I usually lose about one a year, though this year we had such a mild winter, they all did very well. I don't do a lot to winter protect with so many roses. I generally let the oak leaves blow around them & call it good. Of course I will baby a few of my absolute favorites! But if you only have a few, I would mound up dirt around the base in the fall.

The second one is new. Once you type your message hit the "Preview Message" button. On the next page under your message there will be a "browse" button. Click on that and you can upload the photo right from your computer. You MUST down size the photo first! So far I've discovered that it works if you are using Explorer or Firefox but not with Opera.