Hi, my name is ***** ***** I am happy to assist.
Can I ask how your network is currently set up in your camper, and how do you get internet in it?
We can figure it out once we have the basics set out.
So extenders really only work on the router side of things to extend the signal, so I would rule that out. Just looking around, it might be possible for the Toshiba to get a different wifi card for a PCMCIA slot that has a stronger antenna, but for the iPhone, you may be out of luck. The main issue here isn't actually your equipment - its the camp grounds WiFi. Being a radio signal, it can be affected by the electromagnetism of weather patterns, given the grounds and distance it is trying to cover.
Now, the grounds could always add amplifiers or extenders to their routers, which would improve the signal for the grounds, however that's far less likely.
On your end of things, your best bets are either finding a WiFi card that will work with your laptop and has a strong antenna (my suggestion is to ignore specs and read customer reviews with regards ***** ***** people's experience with signal strength), or somehow setting up your IPhone as a WiFi Hot Spot (which is totally going to kill your data on your cellular plan, unless you get unlimited data - and all this provided your iPhone gets decent cellular reception on the grounds).
Let me know how it goes, and please feel free to rate your experience up at the top.
Ok, thank you!