Only 1% of US oil imports are from Russia, so the ban is more symbolic than effective. You won't see any supply disruptions due to that.
The direct economic effect, however, is another matter. The price rises you are seeing are due to market panic and oil company greed. It is worth noting that oil company profits are at record levels. THEY aren't hurting one bit, WE are. Robert Reich has pointed to the approach the Europeans seem to be taking: impose a windfall profits tax on the oil companies. They want to price gouge? Fine, they can fork over all that extra money to the government and do their share helping pay off the national debt. Done right, it would remove their incentive to jack those prices up sky high on the rest of us.
As for our travel pans this year, yeah, $4+ diesel fuel prices are going to hurt. That makes leaving the TT home and staying at motels more attractive. I get 14 mpg towing and 28 mpg without the trailer. On a 400 mile day's drive, that's $64 extra dollars in fuel (give or take a bit). That atop a campground fee makes a guy think about the options.
But we are planning on going . . .