You can get an external wifi such as the BearExtender mentioned above. It basically replaces your internal wifi with an external unit whose antenna is far more sensitive than the one built in. I use one on my MacBook when traveling which will usually result in far better connectivity.
If you have a bunch of devices which all require internet, then maybe a wireless bridge type solution is best for you?
If you stay for a month or so at a time at a site, I would agree with the standard residential type dish. They will get a better signal simply because they are larger dishes. I personally went with the Tailgater. My trips consist usually of one long one (10 days or so) and a number of 2-3 day trips. The tailgater being an automatic dish is fast and easy to set-up and was the least expensive choice for me.
Drawback of the Tailgater (I knew this going in). It uses the western arc set of satellites. So being in the north east, it's not uncommon to not receive the 3rd satellite (the HD satellite), but the other 2 come in just fine. Other disadvantage of the Tailgater is it can have only ONE single tuner receiver (which again is fine with me).
Advantage of the tailgater is price. It's the lesser expensive option which is great for the weekend type of camping that we do.
If I were full time, I would likely get a hybrid solution. If I moved around a lot, I would get a permanent mount for the roof (again automatic) AND a Tailgater (or other portable). If I were more settled in one place, certainly a standard dish which will take far more time to setup, and is far more involved, but will yield better results.
Finally, if you're in the north east, and HD is important it's best to look beyond the Tailgater otherwise I love mine!
I added a second A/C to mine as well. The single 13.5K worked okay, but the second really cools the unit down quickly. Both of mine are fully ducted which gives added bonus. Say you're in the living room, turn on the bedroom A/C to keep the camper cool and it's almost silent in the living room. Visa versa for the bedroom.
The initial cost is a little high, but if your 5th is prepped, you can likely install it your self. Mine was getting warranty work done on it, and they cut me a break on the installation so I had it done! Don't be discouraged, those of us with 2 will almost always say it's money well spent and you will too!
Well, all I know is the transfer switch on my house cuts the HOT only. When I test my generator it *ties* the neutral to the power grid (a lot more than another generator I'll tell ya that) with my generator and the test is successful every time.
I don't see where this is any different, if there's no circuit's using both legs of the 50A service.
I don't have a splitter, but they do exist. They're not much money and will split the signal. I do have an HDMI switch which works quite well. The other option, although expensive is to have a splitter and wireless HDMI extender, no cables to run!
If it were me, I'd go with a 211(K/Z) which you purchase outright from dish for under $100. You can use it as a second receiver in the house. You can also attach an external hard drive which turns it into a DVR (with a one-time fee) and can have it deactivated during periods of non-use. As far as I know that's and a RG-6 cable to connect is all you need.
Just got the Tailgater myself and I too am amazed at how easy it is. One downside to us northeasters is that the dish receives the western ARC satellites which means that quite often the Tailgater will pick-up only 2 of the 3 sat's, but 110 and 119 have the majority of the channels anyway.
On a positive side, you can hook up an external hard drive (powered) to the 211 and with a one time activation fee, turn the 211 into a DVR where you can pause, rewind, skip, and record just as you would at home. Of course the 211 is a single receiver so you can't record one channel and watch another, BUT the DVR function on the road is awesome to have!