KSP

I'm trying to re-enter from orbit after ferrying 4 tourists. My general strategy has been to burn retrograde from my periapsis (which is at ~71 km) until the new periapsis is about 35 km. But no matter how I steer, I haven't been able to get it low enough to even deploy drogue chutes

I also tried a strategy where I put antennae on both of the tourist pods, and separate parachutes on each, and decouplers between the two of them and before the command pod, with the intention of all 3 landing down separately. A week ago, this worked for me on a flight where the tourists only wanted to enter space. But right now, coming down from orbit, every time I try this they seem to crash...but only if I'm not observing them. They come down at a safe speed and the parachutes clearly do deploy, but then upon touching down...they're not available to collect, and the mission is failed. I even tried switching to one of them, and then the command pod disappeared instead.

I suppose there are two questions in this: (1) how can I slow down a 3 tonne vehicle enough with fairly early tech to safely deploy the parachutes? (2) What do I need to do to make sure I can properly track separate craft after they land down?