I have fished the Little Patuxent, Middle Patuxent (Gorman Park) and the stretch downstream of Brighton Dam from Haviland Rd. to Mink Hollow and for my money,
I'd take the Middle followed shortly thereafter by the Little Ptxt. I wouldn't waste my time again with that section from Haviland to Mink Hollow although a member of the TU Ptxt chapter told me that he personally stocked a ton of fish in that section. There is no structure and it is difficult to wade in that the banks are steep and super muddy. The day I was there it was pretty silted and the clarity was rather poor. The only thing my buddy and I had to show for it was a fallfish and another hook up that ended in my tippet snapping at the knot. The 3 times I have fished the Middle, it was super clear and although I didn't catch anything, I saw a bunch of fish (some big ones too). The Middle is a medium sized stream, with pretty decent structure. Nice sand/gravel bed with some nice rock formations and some cliffs. Again super clear and I have only seen one other guy fishing it in my 3 times there. The most success I have had is at the Little Patuxent in the fall after the stocking. The river is beautiful here too. Totally different. Much more rugged. Basically, your typical Piedmont stream that somewhat resembles a more Western River (think North Branch Potomac). There are some rapids that end in deep pools where most the stockers tend to gravitate towards. I did have some success in upper pocket water section swinging a Patuxent special through which was pretty fun. I was pretty surprised at the clarity of this section as well when I fished it in October. It's definitely worth checking out although it is a far cry from a secret spot as it gets pretty heavily pressured after the stocking trucks leave. Recommendation would be to hit it on a weekday.