Oh sayang naman if you don't get to onsen...may private baths naman if mahiyain si hubby.

hakone is a very very touristy place so, you'd have to make reservations early.
we stayed at these hotels before,
ashinoko ichinoyu
http://english.ichinoyu.co.jp/ashinokoqs/index.html*very expensive but sobrang worth it.
also at, Fuji Hakone Guesthouse
http://fujihakone.com/ ...cheapest na siya sa hakone
both hotels are very accessible. not a lot of people there can speak english (except the guesthouse) so, best to bring a map and a picture of the hotel so the bus driver can help you.
tips:
you can pay for luggage service at the odakyu station so they can send your luggages to your hotel, securely (works both ways) then enjoy touring the entire day. please come before noon as they have a cut off for accepting luggage.
also consider getting the hakone free pass
http://www.odakyu.jp/english/freepass/hakone_01.htmlwith Mt. Fuji and Gotemba.... ^_^ really breath taking. paakyat ka pa lang to Gotemba, you'd get a glimpse of him na. there's also 2 sides of Hakone, and you'd be crossing the bridge, there's the really best view to take a pic with Mt. Fuji at your background.
tips:
2 bus rides going to Gotemba....one paid for with the hakone free pass, and the next one is your shuttle to the outlet. BE SURE to be aware of the time schedules at may last stops sila and WHICH BUSES to take. Just remember which road leading to your hotel and you'd be fine.
"When coming from Hakone-Yumoto, take a Togendai bound Hakone Tozan Bus on line T to Sengoku (20 minutes, 200 yen, covered by the Hakone Free Pass), where you can transfer to the Odakyu Hakone Highway Bus (see above)." from japan-guide.com
Our hotel was near Togendai so it wasn't difficult to get back, its usually the center of area. Some buses also take you to Shinjuku.
p.s. must see the open air museum. kakaiba! but baka magahol kayo sa oras. sa dulo kasi yung gotemba outlet...no Mt Fuji views there though.