I also, feel it is best not to draw any attention to what we are doing.
I always cover up any gear in my vehicle with the appropriate cover and try, if possible to look like a 'hill walker' with all gear safely stored away in my rucksack.
A few years ago we had a white 90 Landrover, which whilst very appropriate for our activities was easy to recognise and lead to 'notices being left on it' which were not very pleasant and having the inference that we should not be there at all!