The national average for regular unleaded gasoline ticked up to $2.39 a gallon today. That’s up 3 cents from yesterday and 10 cents from last week. Expect the price to be higher by the end of the weekend, as well.Despite the gas price increase — which has become a part of summer just like holiday barbecues — more Americans are packing their cars for vacations this year. According to AAA, 32.4 million will travel at least 50 miles from home this weekend, up 1.5% from last year.Holiday weekend travelers will be saving money on gas — $1.40 a gallon — compared to last year when gas was near its peak price, but they're not saving a lot. If you’re driving 100 miles to the coast or campgrounds and back and only get 10 mpg — which would be horrendous — that’s a savings of $28.  Let’s say you got 20 mpg, you’re saving $14. That doesn’t even cover a fast-food meal for a family of four.The economy is much worse this year, so it seems the psychological impact of last year's high gas prices might have been more of a factor than the actual costs of any weekend getaway.What about you? Are gas prices a factor during a holiday weekend?