The Hopper 3 is the idea RV receiver because of its multiple tuners allowing you to record anything when it is available and then you watch when you want to. With that in mind, dome dishes are just not practical. The single LNBF limits the capability of the Hopper 3 to not much more than a Wally.
I am a full-timer (no house) and have a Winegard Trav'ler. On a typical year of 40-50 stops, there are only a few times when I need a tripod to deal with trees. For that reason, I also carry a tripod dish.
Since you don't want to invest in a Trav'ler, the answer is a tripod. For an RVer, the best tripod is the HD Tripod from
TV4RV.com. Unless you are always on large flat level areas, you need a tripod with adjustable length legs to be able to get the mast vertical, a critical requirement.
Because I setup on all kinds of surfaces, I use a pair 5 gallon buckets (Home Depot/Lowes) filled with about gallons of water each, more stable than just one bucket. The buckets stack for travel and are ideal for holding the bungee cords and the other stuff for the dish. No need to carry heavy weights leaving more carrying capacity for shoes. You also do not worry about driving stakes into the ground and hitting a water line.
For aiming the dish, using a smartphone that gives you idea of where the satellites are in relation to the trees and other obstructions. A periscope device like
this is a help.
I recommend getting the
screw elevation modification kit from TV4RV.com that makes changing the Elevation a lot easier.
For coax cable, find solid copper core RJ6 wire. Costs more and harder to find but will deal with being rolled up and unrolled in a manageable way. Depending on where you RV have enough cable, the trees can be far. I carry a 100', 50', and a 25' roll. The Hopper 3 only requires a single coax cable.
Also with the coax cable, invest in a connector crimp tool, coax wire stripper and some crimp connectors. It is good practice to put new ends on the cable every year or so.
For a tuning meter, this is a big cost for a Hopper 3. The Allied Instruments Super Buddy 29 and later meters are only ones qualified for use with the Hybrid LNBF used by the Hopper 3. Around $300 used on eBay and may need a battery. An alternative is to use DPP (standard) LNBF heads and a DPH-42 Switch which makes the DPP LNBF act like a DPH LNBF. Then a more normal meter like a First Strike FS-1 or equivalent meter could be used. I recommend a smart meter that identifies the satellite ID when locking on. Dumb meters can have you lock only the wrong satellite and you only find out when running the Switch Check.
A
webpage explaining my tools and setup.