The RIM Embassy in Rabat is easy to find being only 1/2 mile or so of the main North/South highway, parking is easy outside and there was no hassle (N33 33.7 W7 38.7). I had already got a visa in London... they were great, but for me getting to London was a hassle, waste of a day and of course an extra £40 per visa.
I don't know where the campsite is (we try not to use them). We found a nice spot a few miles to the south in the dunes at about N33 33.1 W7 45.0
BTW, people without RIM visas were being turned away at the 1st RIM border post, there was no chance of getting a visa at the border in November.... it's a long way back!