I am running a hilly trail run tomorrow and plan to wear spikes. The course has a paved section of almost a quarter mile. The rest of the course is very rugged in orchards and vineyards. I hope to avoid the pavement part by running on the side if possible, but if I do have to run on the pavement, what effect will it have? I have 3/8 inch spikes. I have not raced in spikes for so long. Thanks.