the creeks you mention fish well with buggers ( white, olive,brown), crawfish patterns (olive clouser ), and small olive/white minnow patterns. keep them on the small side for the neshaminy, tohickon etc. go to a bucks county T.U. meeting and talk to Lou or Henry. they can help a lot.
Source: http://www.paflyfish.com/modules/newbb/viewtopic.php?topic_id=17564&forum=16
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