I find that in the road races I've done so far that it takes a lot of effort to fight for position for an hour. If I just tried to stay in the middle of pack I would always just end up in the back of the pack after two or 3 mintes. Now, there is less of an according affect as it's a road race and not a crit so I may try to be in the back for 90% of the race one of these days, but I find that boring, and I've only done 3 races! I like the tactics of when people are coasting, to follow someone up the side and get "free speed" to move to the front, and then try to be 5th out of 50 or so for as long as possible, until people start moving up around me. It's definitely a moving chess game and it's pretty intense. Even in Cat 5.
I had this grand notion of doing 10 races as quick as possible, maybe even getting 10 done by mid June or so and then upgrading to 4. But then I saw that the average speeds in the 4's road race may be 26mph compared to our 22 or 23mph and I don't know if I'll just get dropped. At least I have time to consider it. There's no mandatory upgrade from 5 to 4, right?