as for why the mosquitoes are worse now than when we were kids, two words:
TIGER MOSQUITOES
http://online.wsj.com/article/SB10001424052702303795304576454312427933764.html
http://www.mda.state.md.us/plants-pests/mosquito_control/_asian_tiger_mosquito_md.php
Unlike normal mosquitoes, they are active during the daytime.
As for natural remedies:
Getting rid of standing water is a great idea. Talk it up to your neighbors, too. Get them to clean their gutters, fix sidewalks, dump flower pots, etc. Not so easy to get all of your neighbors to do this.
Some birds eat mosquitoes, as do bats. Consider getting a birdhouse.
Mosquitofish (
http://en.wikipedia.org/wiki/Gambusia_holbrooki) eat the mosquito larvae.
Get a fan. Mosquitoes don't do well in wind. You can't have fans all over your yard, but you could have one by your picnic table. A lot of covered porches have ceiling fans.
We have done the first three, and I think it made a difference last year, but not enough for me to want to eat dinner outside. I am going to try to talk my DH into one of those old fashioned fans on a pole that we can take outside for cocktails and dinner.
And I'm still considering Mosquito Squad....