a RECEIVER is required at EACH different TV in order for each TV to have it's 'own' channels...
now, having said that, no portable antenna, like your Tailgater, is going to power more than TWO Receivers, and even the 'second' receiver becomes a 'slave' to the Main receiver. Without getting into the deep end, the second receiver can only receive channels from the one the Main receiver was originally programmed to, and only when the Main receiver itself is tuned to one of those channels. Whew, that's a mouthful, but it does work for many people.
As to trying to 'watch' Satellite on several different TVs, though, without additional receivers, it IS possible, but each of these additional TVs will ONLY see what the Main receiver is watching - basically a Mirror Image to every TV.
This is accomplished by the RECEIVER, not the antenna. If you have a receiver with a 'TV OUT' coax, such as the VIP211k, then you can connect as many TVs to that output as you wish, using a splitter if you need to. Each TV will see this 'satellite' signal on the 'cable' input of the TV system, when you scan for channels, usually channel 3.
Now, if you REALLY want to power three individual Receivers and TVs at the same time, with each their own channel/satellite selection, then you will have to either have a roof-top TRAVELER antenna, or the 'standard' manual outdoor antenna on a tripod*. These have THREE eyeball 'LNB' antennas to pick up all three Dish satellites - 110,119,129(HD), and all three to three receivers at the same time.
edit:*or, several portable antennas - there's no law that you can only have one!
The reason a portable antenna cannot power more than really a 'single' Main receiver/tv is because it only has ONE eyeball/LNB - and therefore has to 'rotate' to find the other two satellites when you switch to a channel that they have the signal for. If another receiver was able to power the antenna at the same time, the antenna would not know 'which' receiver takes precedence. The Traveler and standard yard antenna don't have to rotate, they are already zoned into all three satellites at once.
As for cable wiring - you are really the best judge of that since your rig will have a different layout and places to 'fish' these cables to the places you want them to go.
Slide seals, either the top, bottom, or even the side, are good places to bring in cables.
Sometimes you already have pre-drilled holes for other plumbing or electrical wiring where you have room to bring in cables.
Sometimes using a window, especially if it is under the awning, is a simple way to do it, especially if you are only using your antenna every-now-and-then on weekends.
There is no rule book or instruction manual for these things - but you'll learn quick enough after a little usage.
'14 Palazzo 33.3 bunkhouse 34' diesel
KingTailgater2 Dish HD, 100w/5a SOLAR, BlueOx
100,000+mi since '14 - US, Alaska, Canada - Northwest, GA! (also, '14 Gulfstream Amerilite and '07 ForestRiver Rockwood) : )