I have finally convinced my spouse that camping is OK. We're heading to the Yellowstone area. I know the rivers there are plenty, but does anyone have any advice on local fly shops that have good selection and good information on local fish activity? I'm sure some of the veterans out there may have some info. Any help would be appreciated. I'll have my 4 and 3 year old girls with me, so no major hiking would be a must. Thanks for your help.