I have posted up in a few threads that nowdays keeping a travel router around is a good plan. First it can be the router for a cable modem setup. But also able to be a client or repeater for low wifi signals in a room or at a campsite.
This one is 25 bucks
Another for 20 bucks
These are not high end routers, but should get the job done on vacation or business travel. I use a full blow router with DDWRT loaded on it, but I have a custom setup to pick up some hard to reach WIFI at my normal camping spot with an external antenna to get the park wifi and use the internal antenna to repeat it in the RV.
This one is 25 bucks
Another for 20 bucks
These are not high end routers, but should get the job done on vacation or business travel. I use a full blow router with DDWRT loaded on it, but I have a custom setup to pick up some hard to reach WIFI at my normal camping spot with an external antenna to get the park wifi and use the internal antenna to repeat it in the RV.