There are a range of things that you can do during the day for a bucks party. Below is a list of activities that could be done, bare in mind though some can't be done while consuming alcohol (well more so shouldn't be)
If you have the time you can always have a weekend bucks party. This can also be a good idea if some people can't make it on one day of the bucks party. Typically these weekends are centered around an activities or a place and the drinking practices are more restrained than a normal day/night bucks party
If you have any further suggestions or experiences that you think would be worthy to telling people about please feel free to email them through to firstname.lastname@example.org.