Is your bedroom receiver an H25? I don't believe there is an HR25. If it is an H25, that receiver requires a SWM setup. Which you could do, if you want. You'd probably want a SWM8 switch and then you'd need a power inserter for the SWM8. You'd plug all four wires from your dish - probably right at the dish - into the SWM8 and run one wire to your trailer. That one wire would plug into the power inserter, and the satellite output from the power inserter would plug into a 2- way SWM splitter; one output to each TV.
Or, you could forget the SWM setup and run two outputs - any two - to the HR24; with the two inputs, you'd be able to watch one channel and record another (which will also work with one SWM input). But then your H25 won't be able to work.