Employee Holidays summary in Resource Planning / or Serveral Months along with ongoing projects

1. To get overview of Resource planning for Multiple projects and also their availablity like their Holidays, sick leaves etc.

I followed the previous forums and created a Admin project to enter the Off days in real work allocation. And then i see using coloured monthly resource
planning or may one month extra for off days and also extisting projects.. But i dont get complete overview of the reosurce planning for several months .

Is there a trick or tip where i can see the off days of team members in the Resource planning along with existing projects.

2.Second concern is.: how can i assign same resource , same task but different interval. Ex. Source A, Activity A in week 34 for 3 days, and then again in Week 35 for first two days. For Activitiy is it possible to give only one start and end date ?