With the Samphire Island scene, Lindsay, I often take a handheld series of bracketed exposures then try to do a hand made merge of the images using layers and masks instead of an auto HDR.
If the scene is static (nothing major moving around) I can usually manage to merge bits like sky from one shot to another. Do an auto alignment then gently edit some masks to produce the desired effect; using a low opacity soft brush to slowly add in the effect. Even if it doesn't work you haven't lost anything because you still have the first shot. Leave a bit of cropping space in the composition for trimming off any camera movement errors.
But I know what you mean about being in a group. When setting up my camera for things like bracketed exposures I need a bit of calm clear thinking time. If I get rushed I become confused and forget to press Set, which gives me 3 identical images.
So I always keep clear of groups when I am out with my camera, or make sure everybody knows that I am liable to wander off and continue doing things my way. Otherwise you all have to move at the speed of the fastest which gives little time for looking around and doing your own thing.
I remember many years ago in my local pub we developed 'rules' about not buying drinks in rounds where you all end up throwing beer down your throat just to keep up with the fastest drinker.