Why two call signs? Back in the '80's, I got a reciprocal call sign while visiting the Cayman Islands, ZF. I've held on to that call over the years so I can operate there any time I visit.
OK on changing signal strength as you drive high on the ridge or down in the valley. Remember, the better antenna is one with the most aluminum up as high as you can get it. Your signal reports are going to be best when you and your LC are on the ridge. That rule holds true with 2 meters and CB, too.
1966 FJ45 LWB Pickup
1985 BJ74 RHD