Ideally yes, but if you can flatten it a bit first, when the mats are linked together they might wobble at first but hopefully settle down with use
I mean the solid recycled plastic square mud control mats, not the rubber ones
You could try the bale but it sounds like you have water coming from somewhere and it could end up a worse bog
Mudcontrol mats, sorry,with sand over if slippy
See if they have any old carpets at the tip?
Maybe smile and nod at the "helpful person" and continue as you were before. I'm sure your chosen rider will soon be able to tell you if he is up for more or needs a break