RV internet gaming

If the OP is going to sit and play games on the internet, he won't know if he is camping or not so he could just sit home, play the game and pretend that he is in his RV enjoying nature.

What about satellite options?

the internet providers charge per gig of data, plus the line charge. Plus they do not have unlimited plans. So every time you go over your monthly plan it costs more. Gaming eats up large chunks of data!
Go to www.verizonwireless.com and select "shop" then "plans and services" then "more everything" then scroll down to where is shows data charges. I have 10GB plan and don't do gaming or movies. 10GB plan is $80 per month plus the phone line charge which I think is about $30 per month. I have a Verizon Mi-Fi hotspot.

What is it that costs so much?

Nothing you will be able to aford. Not to mention speed