. . . . For me, the easiest way to deal with the hand-brake might be to throw a jacket, or rag -- anything to cover it (when it's parked of course). But I'll give the e-brake more thought. . . .
As you give the e-brake/parking brake more thought, disregard any further consideration of the hydraulic line lock. DON'T DO THAT.
I did it. I learned I was an idiot for it. Don't be an idiot too; and learn from my mistake. For reasons mentioned by Danny and Stan in posts above, this is not the way to go. It probably won't pass any state brake inspection (definitely not CA) and most importantly, it is NOT reliable.
Think about this: The line lock concept relies on maintaining maximum hydraulic pressure in the brake lines and the brake cylinders for an extended period of time (like hours, days, weeks and months, or forever). As you know, it is the hydraulic pressure that holds the brake shoes (or disc pads) "locked" tight against the drums (or discs). What I learned is that the hydraulics system cannot be depended on for that.
I started to figure it out one day when standing next to my spyder parked (line locked) on a slight hill and happened to notice through the corner of my eye that my spyder was beginning to roll down the hill. After a frantic Le Manns start dash into the cockpit to step on the brakes I thought that was exciting; and made a mental note to myself to set the line lock more forcefully next time. When the same thing happened again, I thought I must have a defective line lock, and replaced it. Then came the day the line lock would not release, without actually cracking a rear brake cylinder bleeder. I had to drive home with the bleeder cracked, obviously with diminished braking ability and hoping not to run out of fluid before getting home.
Having learned my lessons the hard way, I removed the line lock forever and drove around for the next many years without a parking brake (but with a short stub from a 4"X4" post behind the seat to have for a chock just-in-case.
Eventually, when doing the California SB100 dance I was forced to install a parking brake, which was required to be mechanical (either manually or electronically actuated). Hydraulic line locks were specifically prohibited, I know why.