You may not be able to completely avoid additional receiver fees (legally), but you can minimize them by using RF Modulators to redistribute a smaller number of receivers to every TV in the house.
In a nutshell, you plug the AV output from the DishNetwork receiver into an RF Modulator. The RF Modulator then converts the satellite output to an unused UHF or CATV channel that can be added, via a simple 2-way splitter, to your household antennae or cable wire. As long as you pick a clean channel (nothing else broadcasting on it), the pictures competes with the S-Video out going directly into the TV. The good RF Modulators let you pick any legal channel and retransmit the audio in MTS Stereo format.
Net result is that you usually only need as many receivers as independent viewers in the house. In my setup, we have 3 PVRs modulated and redistributed to 8 TVs. This allows three different DishNetwork channels to be watched on any TV in the house by simply tuning to channel 84, 86, or 88. The system is so easy to use that my 3-year-old knows that Toon Disney is usually on channel 86.
Then, since most of the good DishNetwork receivers and DVRs use UHF remotes, you can change channels anywhere in the house. We bought some extra remotes and keep one set of remotes upstairs and one downstairs.
As complicated as this all sounds, it sure beats spending an additional $25 a month on additional receiver fees.