As others have said, welcome to Oregon! Enjoy our endless bits of rain.
As for your questions...
1.) Is this con any good? I come from the mid west so I'm used to places like Acen, Anime Punch, Ohayocon, sugoi con, matsuricon so on and so forth.It's not a huge convention by any means, and sometimes can be rather disorganized, but it's still a pretty good convention... And pretty much the only anime convention you'll find in Oregon. There's the Sakura Con in Washington but, well, that's in
Washington.
There's usually enough to see and do while you're there, most of which are panels (though not much in the line of special guests usually), but if you keep an open mind you should enjoy yourself.
2.) When is a good time to reserve a room? and if it's already out of rooms where is the nearest hotel to book one?I assume you don't live in Portland? If not, the best time to reserve a room I assume would be at least two or three months in advance. Granted, I live in Portland and don't need to stay in a hotel, and the only convention I've ever reserved a room for was the Star Wars Celebration IV and Star Wars Celebration V this year, where the room was reserved about six or seven months ahead of time.
As for where to go if the hotel is full... Well, the location of KumoriCon changes from year to year so I don't really know how to answer that. This year it's at the Hilton downtown, as it was last year, but I don't know what other hotels are in the area.
3.) nothing else really I'm just stoked I could meet new friends I left all of mine in Ohio =[ I'm sure you'll be able to make plenty of new friends here.