Our trip up through Spain & France has really shown us what can be done on a limited budget to establish a very usable aire.
The pictures below are of a couple of sites we visited, both could be built on a minuscule budget and are 100% effective and do the job satisfactory.
This one is on a site in southwestern France...
Very simple bollards, one with water tap, the other with manhole lid and rinse tap.... drive over drain slopes to the centre, parking beside for 3 vans..... very simple but effective and outlay to provide is minimal.
This one near Laval is a bit more refined, but still a very simple design, basically a slab of concrete with sloping drive over drain, a wall with manhole for cassettes and a fresh water tap and room for bins. Very simple but is very well suited to do the job.... parking for 12 vans on this one.... not an expensive install at all.
Pity our elected representatives cannot get their act together and provide services like this, especially along the WAW..... I bet the Irish budget for feasibility studies and other related nonsense would be enough to establish 100 of these...... sad but true.
We can only but dream.