Thanks for the suggestions so far. Perhaps I should add that as far as the weights go my intent was to get to where I was at "snorkel depth", then put ask and snorkel on, blow out the snorkel and try to the clear the mask and then repeat. I wasn't planning on weighting myself to the bottom at 14' or anything. When I was younger and snorkeled a lot, I used to use a weight belt to make myself slightly less bouyant so when I wanted to go down to look at something I could do it with less effort and stay down a few seconds more. I am a pretty bouyant guy. On the other hand, this was back when our masks were large ovals made of rubber.
Also, I am already swimming (well, swimming/floating/coasting) 8-10 laps a couple times a week and routinely climb 12 flights (floors) of stairs per day, so I think I'll be okay on stamina and won't pop an artery or anything.
I have tried all the masks at the two local dive shops, and none seem to fit my nose right except maybe a scubapro crystalvu that I saw last weekend and which I will try out. I didn't actually care for it that much, but if it works....
I usually test a mask by putting a snorkel mouthpiece in my mouth, holding my breath and "suctioning" the mask to my face slightly to see if it will seal. Unfortunately, I can get some masks to seal pretty well above water but then they leak when it matters. I also can breathe fine through a snorkel with no mask so I'm hoping that doing so on a regulator will be okay. I haven't tied swimming with just a snorkel, perhaps I'll give that a try, although I am not quite sure how you get it to stay in place.
I have never used a regulator, maybe that alone will solve my clearing problem. I will have to wait to see on that. Perhaps also it is easier to clear a mask under water. When clearing at the surface while snorkeling I have some limitation on how much I can tilt my head up before my head is out of the water anyway. I will check out the masks in the shops again, and will continue the surface swimming, treading, etc.
Again, thank for you suggetions and help.