For Wifi I use the Hawkings Smart Repeater with a Hawkings Amp to an outside marine antenna on the roof. I put it on a movable mount and raise it when not moving. Works pretty good and Ive picked up signals more than 10 miles. However its one thing to see a hotspot its another to actually obtain a usable signal. Park wifi is an issue with everyone having a smart phone, net flix etc. I also bought a directional antenna as we dry camp but it can be a pain to aim and reboot the repeater. I am going to make a high gain omni directional antenna to try and solve that. A larger amp will also help this one is variable to 500 mw.
Cell wise I have a Wilson amp and the candy bar antenna. I spoke with Wilson about a ceiling mount or better gain antenna and they said being in an enclosed room like an rv, surrounded by metal its not a good idea as there would be to much radiation. They had me run tests on my amp and it is producing properly. It is older 3g unit and I am going to buy the newer unit which should work better. This time I am going to ask them If I could purchase the ceiling mount antenna and perhaps place an attenuate in line to lower its gain as both my wife and I use the phone.