Not really mate.. If it's just a standard RWYB day (which it is), then it won't be that busy to be fair, so we should all be able to get plenty of runs in. You would still get a decent amount of runs in if it was mid summer, so long as it's not a show day. But earlier on in the year (when there's more chance of the weather being pants and cold) it's quite a bit quieter..
That said, if you want to play extra safe, then there would be no harm in giving them a bell to double check I suppose. But should be fine.
I for one will only be running about 4 maybe 5 times max, so should easily get those in.. For the ones that get addicted (which is easily done) and can't get enough. Just make sure you are there early doors..