I'm getting married in October, and we plan to have a registry up by the end of May. Between then and the wedding, we will be having two showers (two different parts of the country) and I'll be having a bachelorette party. I really, really do not want people to buy us multiple gifts for these events plus the wedding itself, especially multiple pricey gifts off our registry. But that seems to be how people do things these days (at least in my experience as a wedding/shower guest over the last 10 years or so), and I think that if I say nothing, people will default to the multiple-presents idea.
Is there ANY polite way of communicating to people prior to the shower or the bachelorette that we are not expecting multiple presents? Clearly I can't put anything like that on any invites. Is it better to spread that notion by word-of-mouth (by the shower/party planners, not by me)? Or should I just let people do whatever people are going to do?