OP, is money tight ? If not then go for the 10Mbps, unlimited data, 30 days 'Internet on-top' from AIS for 1100baht. I'm sure there are other packages for cheaper, maybe even other carriers but you have to get a new sim.
I have 6Mbps unlimited from AIS 'On Top' package. I use average 3GB per day. Not many packages are for 17 days so you may want to think about 30 day unlimited data and at least 6Mbps. I personally would go with AIS 'Unlimited Internet' a 6Mbps for 850 baht and expect stuttering from 6pm to 9pm (lots of surfers at that time of day). If you don't mind the extra 250 baht then , heck, go for the 10Mbps at 1100 baht.
I'm sure there are better deals , especially if you can go with a new sim. You can even do 7 days twice and 1 day 3 times to get AIS cheaper.