I actually just posted in your other thread and then saw this one!
Depending on where you are birthing, how best to make the stay nice is different. A bedside lamp can work (and batteries are good because many places will not allow you to plug anything in to the wall) but at LICH, for example, you don't need it. LICH has great exam lights that you can turn into a corner and get nice soft lighting and then turn everything else off. You can bring a battery powered speaker set for an ipod and have music. Bring a nice big towel if you might get to use a tub (again depends on the place you are birthing). They almost never have towels and a huge soft one is perfect. Bring some food for after the birth. They have terrible food in the hospital and if you give birth at 2 am it is tough to get food. You'll want something yummy most likely, so this is a nice thing to bring along. bring your own blanket if you have one that you feel you'd like to have in the room. It can make it more personal in there. It might get dirty, so be aware of that, but it can bring a more homey tough to the hospital linens.
As for the doulas issue, I think that when in doubt, more help is always better than less. Your husband is your life partner and he loves you more than anyone or anything else in this world. It is going to be an overwhelmingly emotional experience for both of you and most men are brought to tears by the sight of their wives birthing their child. Expecting him to be your primary/only support person through much of labor might be tough. I did this with my first labor (just my dh and I and it was HARD on both of us). In the end we had to call in two other people to get bus through the last 5 hours and I vowed to never try that alone business again! With my second baby he was still my primary support person but we had other help so that he could do things like go to the bathroom or eat without me feeling alone.
With my first I thought my midwife would be with us and she was terrific but she would leave the room some times and that was really hard for me. She had to take calls, talk to staff, file paperwork, get supplies, take care of herself, see another client who came in in labor, etc. They are there much more than an OB but they are not a doula who offers continuous support.
You might consider at least having a friend (but make sure it is someone who can actually be there and actually stay - friends are flakey often). This way you have someone to get you things when you need them, to offer new energy to the situation, and to keep your spirits up.
Doulas can bring so much to the birthing experience - not just snacks and such. Most couples find they feel renewed and ready for the hard work of labor when their doula arrives. the doula supports you both, not just mom, and for most dads this is a HUGE help. If labor stalls or is slow, doulas can help with positioning and techniques to move labor along. it is hard tyo describe all the help a doula can offer because the help given is always different. Doulas help grab vomit buckets while dad holds moms hair and reminds you that vomiting is good for opening the cervix
Most dads find having a doula makes them a better support person because most doulas really guide dads to take care of their partners. Moms with doulas have a much better feeling about their partners afterwards (studies show) and feel closer to their dhs after labor than moms without doulas.
I am quite certian you can do it without a doula and that you have enough love and support within the two of you to make it through, but birth is something most women only do one or two (or three times) and you will always remember this day. You want to do more than make it through. You want it to be wonderful. You want to remember how loved and supported you felt and how confident you were.