Yes, it is/was pretty remote like 14 miles, all on base at 55 mph, from the Rosamond “gate” to seeing the guard shack and other base buildings. BUT it was an awesome assignment
I'll be honest, a lot of people from the DT community seem to dislike Edwards; however, having been assigned or TDY enough times to the other DT locations, Edwards ranks pretty high for me for the exact reasons Stitch and Magellan noted. One thing they did not mention is that you are about 3 hours to everything...beach, mountains, Vegas, etc. Personally, it was great being so close to the Eastern Sierra Nevadas and all of the great hiking there. The Edwards airspace is great too...not quite as good as the NTTR, but it is the only place where the highest and lowest elevations in the lower 48 exist.
More importantly, make sure you know you want to tread down the DT path. Just like in picking an airframe in UPT, you should pick TPS or non-TPS based on mission not location. For most communities, once you go to TPS, you will not return to the 'regular' AF. You'll have opportunities to integrate with the operational test and even operational squadron folks from time-to-time, especially if you are a fighter or bomber guy, but it's unlikely your old community will bring you back for leadership or other opportunities. You'll still be managed by your old communities developmental team; however, for all intents and purposes, you're a persona non grata to the old community. Unfortunately, the test world has not capitalized on this gap and talent management has suffered as a consequence. Nevertheless, the DT world has improved in its efforts to be relevant for the rest of the AF by working with current warfighters, which may help soothe the sting of not being able to do the real-world mission anymore (if that is your desire).