Wireless Joint

I'm living out of an RV right now, and the current camp site has just awful wifi. Hard to get any work done because of it. So now I'm trying to figure out what is my best option for internet.

I have a GL.iNet AR750s travel router, and it supports plugging in a USB modem or using a phone to tether over USB. I'm thinking about getting either Visible or Cricket and trying to get tethering working that way. Is there a better one I should be looking at? Is there a recommended USB modem or should I not even bother and just use a phone?

For short term use? Id say tether your phone. If you want a robust option that doesn't tie up your phone, then something like a cat 12+ modem should work well with the GL.iNet.