Second marriages are less formal as far as "gifting" goes if the same guests that attended the first wedding will be attending the second -"Your attendance would be lovely ,no gift please" , on the invitation or something of that nature. It is acceptable to have a Bridal Registry for the second marriage noted on your invitation (but not for the same people who attended your last wedding) Couples on there second marriages already have "toasters" and are established in those areas, so camping gear, hobby related items. Fine China and Silver would not be proper. A get together for the bride with a few close friends before the wedding , not so much a "Shower". It is still a special day for both the Bride and Groom and should be treated as such ,but with tastefully. It is not proper to wear the same dress ,or Wedding gown to your second wedding ..even if it is a designer gown, that would be tasteless and rude.