I know they're for TV, and I wouldn't be comfortable at the end of the jib booms anyway.
The photographers' holes looked too close for me to be able to catch a car, even if security left me there all day. The marshalls points looked to give the best views but I suspect even accredited photographers wouldn't be allowed to be getting in the way.
Most UK circuits the bit between the armco & the netting looks the ideal spot, where the challenges might be closer to what I can cope with. My pit lane pass might get me into this area - but only after the racing is over.

I've not got to many Grand Prix, but I've got familiar with the issues with catch fencing from the work I do with British motorsport. I've found infield locations at several of the major UK circuits where I get a mesh free shot, but the views are all fairly similar. Cadwell Park is unfortunately not one of the circuits I get to visit, but I've heard good things about it in the past, I'll have to see if I can arrange a special trip.

This weekend I'm at Oulton Park with the touring cars, but the timetable won't leave me much chance for photos, I think free practice & the first BTCC grid will be my only options, with such limited opportunities I won't be taking my K7 sticking with my micro 4/3 kit (so if I do get any decent shots they won't be posted here).

Whilst I'm frequently highly jealous of your access I don't kid myself that I'd match your results even if I had it. At Monaco the only professional photo points I saw that I might have been able to get reasonable shots from where the raised TV platforms.

I wasn't actually there for the race itself, just for the Thursdays free practice, but even so it was an excellent trip! Having visited briefly years ago and driven round the circuit while its a public road I can say that in race format Monaco is quite different than during the rest of the year.
I heard that the equivalent of our hospitality package on race day cost £2800 per person somehow I don't think either the supplier who set up the package or my employer would feel that sort of money would be well spent.

Seems rather optimistic to suggest it will only be one thread!

I've got rather used to that Don, and at least it gives me an excuse for not getting as good shots as Simon does.
At Monaco the other side of the fence is directly on the track, but there are splits in the fence for the pros.

There were certainly quite a few where things still managed to block the view. At least with the fencing you can make out something through the posts. Some of the other obstructions were just too big:

Monaco GP2 censored by Mike Kanssen, on Flickr

I was lucky enough to get a trip to Monaco just over a week ago for a seminar, which included a near ideal spot for watching the goings on. Still some crash netting but otherwise hard to beat.

Here are some of my favorite shots (mix of GP2 & F1):


Monaco gp2-18 by Mike Kanssen, on Flickr


Monaco F1-26 by Mike Kanssen, on Flickr


Monaco GP2 Location by Mike Kanssen, on Flickr


Monaco F1 -Close Pastor's Lotus by Mike Kanssen, on Flickr


Monaco gp2 prang by Mike Kanssen, on Flickr

+1
No 3 is my personal favorite.

I'm off on a similar quick trip to Monaco this week.

My photographic kit will be somewhat more extensive as I usually need a long lens for motorsport (DA55-300 will have to do the Bigmos doesn't fit my camera bag) yet I also want a fast lens & a standard kit zoom for the rest of the time.

To make things awkward I want to do some IR on the flight (adding a second body but at least mines only a tiny micro4/3 job.)

I think all this will fit into my normal DSLR backpack. If I take out the DA10-17, teleconverters, Macro & off camera flash I might even have room for a change of clothes...

Both 6 & 8 could work well for stock photography backgrounds, with the interest off to the edge it leaves the centre for text...

With the 'still' shots I rather like no 2, the spray in no 7 could have worked well but seems to far away to me, but that may just be because it's too much like what I see on cold wet race meetings. I don't think I've ever managed a group spray shot that I've liked.

Overall though 1 & 9 are the winners IMO.