Thanks a mil for your help frisbee..
I'm going for 5 weeks aswell and the way we're gonna dodge the visa issue is travel to laos after our 20th day so that we will be granted the 15day visitor visa when entering back into the country by land..you are automatically granted a 30 day visa when you fly in by air but as we'll be there for 35days we are gonna go2 laos..otherwise if you wana get buy a visa its about 50 euro. The cheapest injections I could find was on travelhealth.ie on dawson st..its 125e for student consultation and the 3 basic injections needed..tetanus, typhoid and hep A but if your goin trekking you've to get hep B and rabies which brings it up to about 365e..its mental the price but knowing my luck i'd probably catch something so i'm not chancing not gettin them!! Prices 4 flights keep going up so i'd book asap..i got mine from dublin for 677 with turkishairlines but it now costs 1600..try kayak.com, www.momondo.com, travelpaths.ie and travelsupermarket.com. Hope that helps