Sorry to hear of the loss of your friend/brother. That has got to really hurt.
Carrying on is the right thing to do, and yes...he will likely be there with you.

I've been in StL about 1.5 years so far, but haven't fished the trout parks in MO yet. The two you mentioned seem to be the favorites of many of the trout anglers here. I'm sure I'll visit them at some point.
Best of luck to you and your family!