Mt. Hood pond is youth angling only from April 1- August 31. It is open to anyone now, but it has not been stocked since the spring and is probably loaded with weeds right now.
Salish pond is having a lot of work done to it and they stopped stocking it last year. It is not supposed to get stocked again until late 2014. There are warmwater fish there, but unlikely you will find any trout.
Here is a link to the stocking schedule:
http://www.dfw.state.or.us/resources/fishing/trout_stocking_schedules/2013/Northwest.pdf
Recently stocked lakes are all a bit of drive: Harriett, Faraday, Estacada, Trillium and North Fork Reservoir. Those are probably your best shot.
Good luck.
Oops, did not notice lack of vehicle. You may want to think about fishing for warmwater fish at Blue lake (also gets stocked in the spring for bass). Also if you can make your way to Columbia (by bus given distance) you can fish the shore (any rocky spots) for smallmouth. Not trout fishing but still a lot of fun.