two wireless networks?

My RV PC (Windows 7 professional) has 2 network adapters. One's internal and one is USB.

Here's what I want to do:
Install 2 wifi Wemo switches to control 2 TV's.
Install a Echo dot.
Use one of my adapters, "adapter 1", for those devices by setting up a network with the dot and the wemo switches on it.

Then use my 2nd adapter "adapter 2" for hooking to a campground (or at home) wifi network for internet.

Then set my PC to let other devices (the dot and wemo's) to use its' internet connection through "adapter 1".

Can the PC let devices on "adapter 1's" network, use its' internet connection on "adapter 2"?

NOTE: I also have a router and cable modem installed that we use when we camp for a month. Those times we just have cable hooked up and pay for high speed internet using the modem and router. Other times we go someplace for a week and just use the campground wifi.

I'd like to set the Echo and wemo's up one time on their own network and be done with them. The dot has to have internet to work so the 2nd adapter could use campground wifi or my phones' hot spot.