I always suggest setting up at home first that way you have your home satellite antenna available to mimic settings. This way you could test your equipment and ensure your RV passes satellite signals unhindered to your receiver, our rig was supposedly satellite ready but connecting to our single exterior coax input would still not allow passthrough of sat signal to sat receiver. Simple 10 minute mod took care of this issue.
We have changed back and forth between Directv and Dish network several times and pointing the sat antenna doesn't differ much between the two services, although Directv is a bit more forgiving and easier to point IMO. With either you are trying to peg the center satellite which is 119 for Dish. We always use the signal meter on the receiver and a $5 compass to get all the same channels we have at home.
The kit you linked should get you all your subscribed channels, for Dish network it is paramount to have mast plumb to start the set-up. Winegard has an adjustable tripod that has a level within the mast greatly simplifying the plumbing process. After we plumb the mast we mount our sat antenna and use compass to set azimuth. Connect coax and turn on receiver to ensure we are getting signal to inside of RV.
Something to note are that sat antenna parameter settings don't differ all that much even a few hundred miles away, we set-up our sat antenna at home over 2 years ago and have traveled throughout the four corner states as well as Cali and Texas and after locking in sat 119 only required very minor tweaks if any to lock in 110 and 129. Locking in 119 requires proper elevation and azimuth, skew only matters for 110 & 129.
Get into the dish pointing window after setting up your sat antenna and connecting coax, and run a check switch to get the ball rolling. Then use compass to lock in 119 first, with a plumb mast this only takes a couple of minutes. Select 110 and 129 to verify they are also locked in, they might require minor tweaking but often times are locked in as well if skew is properly set beforehand. With practice it becomes easy.