Ryn,

If he likes sleeping in the chair, let him. When Lelani came home, she slept in her carseat through the whole day. I only laid her down at night. She still sleeps in the seat sometimes. I don't think it matter where he sleeps, maybe he gets a little reflux and sitting up helps. As for Dr Seuss. I think maybe try for a night. If it works, great, you got one night's sleep, if not, try something els.

Stay strong, one day he will be 18, THEN you can sleep late and stay in bed the whole time!!!!!

I got this off the internet for you. I have a book that says the amout of blankets that should be ok for the temp of the night, but I lend it to a friend and I can't call her now (her bub has just come home, I don't bother new moms) This was the nearest I could find. Hope it helps.

Managing your baby's temperature
Babies are unable to regulate their body temperature in the way adults do. When adults are cold they shiver, and when hot, they sweat. It is important to keep your baby neither to hot nor to cold. The following suggestions are given to help you keep your baby's temperature within the normal range (36.6oC to 37.2oC):

Try to keep the room temperature between 16-20oC - this temperature is comfortable for most adults wearing short sleeves.
Use the right amount of clothing and bedding - during the day your baby should wear the same amount of clothes as you wear plus an extra layer. For example if you are wearing a shirt, baby should wear a babygro or t-shirt or dress plus a cardigan. Babies should wear hats in summer to stop them becoming sunburnt and in winter to stop then getting cold. At night babies should wear a nappy, vest and babygro or gown plus a sheet and couple of blankets. If the room is cooler than 16oC then 3-4 blankets will be necessary; if the room is warmer than 20oC then only 1 blanket or perhaps only a sheet will be needed.
If your baby seems restless or fussy and his skin is flushed and feels hot, remove a piece of clothing or blanket. It is normal for babies to have cool hands and feet but if they feel cold and look blue and blotchy, add mittens, socks/bootees, a hat and a cardigan or blanket. Remember to take off baby's outdoor clothes when you get inside.
A hot water bottle can be used to warm a bed but babies should not be placed next to the bottle. The cot, pram (buggy) or car seat should not be next to a radiator, heater or fire, in direct sunshine or near to draughts - for example an open window.. Remember, babies who are swaddled in a heated car can easily become overheated. Never leave your baby in the car without you being there.
Before bathing your baby, make sure the room is warm and that doors and windows are shut.