A little late but since no one has responded to Max I will!
Max, there are plenty of drinks stations all with water, I think bottled water rather than cups.
Jelly Babies, well these are on offer at various points around the course by very nice members of the running club.
If you are doing the Marathon then there are gels, I can not remember at which miles these are at but if you look on the Thanet Road Runners website then you will find all of the details on there.
The organisation is fantastic, they address any issues that happened in the previous years in order to improve things going forward. I would highly recommend any event organised by them - and no I am not a member of the club and have no ties to them.
The course, well again this is detailed on the website but I can tell you the half Marathon part of the course is a little hilly, well quite hilly, there is a b*t(h of a climb at the light house on the way out, which because it is an out and back you get to do all of the hills in reverse on the way back - just remember that as you run up and down them going out! The second half (which of course makes up the marathon) - after you run past the start finish line - is mainly flat, there is one bit where you have to go down to the prom and then of course you need to get back up to the road - a short but harsh hill I think around mile 18 ish at a guess. Finally there is a hill toward the end, you would have run down it on the way out (passed the police station) - Fort Hill - again is fairly short but at that stage of the race (around mile 24/25) can be a little tough - just thinking about the short distance that is left though will get you over it.
If you did the Thanet 20 then some of the first half is over the same course, admittidly not much of it but the bit where you ran along the cliftops at Broadstairs and round to Ramsgate, well the course goes over that bit as well, although it is not entirely retracing the route.
It is by no means a flat course but enjoyable yes, friendly yes and well worth doing.
Oh I would recommend seeing Tim at the end of the race as well, he'll sort out any sore bits you might have, he is very good and a very experianced runner himself.
I think that covers about it, oh, there are plenty of toilets at the begining and there are some public toilets on the way round as well.