I added a commercial VHF/UHF dual band transceiver to my EDC. It can be connected to a GPSr via TinyTrac. The APRS tests are not suficient for a report yet. I usually use it with a pack of AA rechargeable batteries. This configuration yields about 0.5 W PEP. I had QSOs at a distance of about 20km with it and got 57 to 59 rapports. With the original rechargeable battery it has about 5W PEP. I got 59 rapports at a distance of about 40km with that.
The rig is about the size of a pack of cigarettes plus the antenna. It is protected against vibration and light rain.