300 is ok and common. If you've already scanned some photos at a lower res and edited them you may want to consider re-scanning them again just to preserve the source material as best possible. Just a thought, it's up to you though

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Ok here's what I got. I'm quite certain I could improve on it, particularly in the tree area but it's diminishing returns from here on and I am tired. I'm going to go ahead posting it and stop. If Xion or anyone else wants to take a crack at it go for it

(I'll send you the psd if wanted).
Yay sister

! Merry Christmas, Jesus loves you

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...And now a pointless song because I am weirder the more conversely tired I am...
<sung to The Candy Man tune>
Who can take your photos,
Airbrush out your thighs?
Cover up your wrinkles and add a twinkle to your eyes
The Gerbil man? The Gerbil man can,
The Gerbil man can 'cause he mixes up the colors
and makes us all look good.
Who can take your head,
Put it on some other guy?
Photoshop some lolcats and make us all wonder why
The Gerbil man? The Gerbil man can,
The Gerbil man can 'cause he mixes up the colors
and makes us all look good.
The Gerbil man fakes
everything he makes
flattering and fictitious.
Tell him your picture wishes.
You can even replace your Mrs.!
Who can take two critters,
Merge them into one?
Sell it to a tabloid and collect a hefty sum,
The Gerbil man? The Gerbil man can,
The Gerbil man can 'cause he mixes up the colors
and makes us all look good.
And the we all look good
'cause the Gerbil man thinks we should.