I'm planning to go overseas (USA) and want to use my laptop to connect to the internet for normal surfing, including checking bank account balances, web mail, etc. I'm wondering if there are any dangers in using these connections in a hotel?

I keep my laptop OS patched and my antivirus software (ZASS) up to date. I also run regular scans using Malwarebytes, SUPERAntiSpyware & Windows Defender (each also updated regularly).

My guess is that using an ethernet connection in a hotel should be as safe as using it at home. Am I correct in this assumption? Also, what if the hotel has a wireless connection available to guests. Would it be safe to use it, and what precautions would I need to take? I have some doubts about this one.

I use Firefox 3.5.5 which has a number of Add-ons, including AVG Safe Search, KeyScrambler 2.6. & WOT installed. I also have a sand box programme (Sandboxie) installed. Does this have any limitations?

Your wisdom and advice would be much appreciated.
Thanks