The the tripod stand for a set of worklights but without the lights. If you are going across the water, Bricoman at Boulogne does one for about _11, or failing that any Leroy Merlin albeit they are a tad more expensive.
Also get some wingnuts for the u-bolts on the dish - makes it much easier to put together and take apart.
When fitted to the tripod (can be at ground level if it has a clear view) orientate it so that there is a leg behind the dish and a V at the front, then insert an awning peg over the back leg so the whole thing doesn't get blown over.
Alternatively, get a 1.5-2m ally 52mm ally pole, remove your jockey and fit the pole in there (or fit a second jockey clamp to the A-frame) and put the dosh on that. A 60cm dish is better to use than a Zone 1 (English) Sky dish although a Zone 2 (Scotland) Sky dish will work adequately well.
Don't forget the bird is actually quite high in the sky - a Sky dish on a pole 1m above the gutter at the (relative) back of a house will see the sat over most roofs. Thus, at 1.5m on the A-frame the dish should 'see' over the top of the van.
Now tell us you are using a motorhome.......?