honestly dude, if this is just a daytrip that you'll probably never repeat, I'd just drop by any supermarket and grab a straw hat. otherwise, check out your local REI or sportsman store
Some people have different proportions, so I guess you just have shorter legs and a longer torso or something. You should buy the pair you want and get it hemmed though, rather than buying your 3rd or 4th choice based entirely on length.