Lots of larger ladies carry OK & give birth without too much difficulty.
Your choice of hospital however will most likely be reduced as a high BMI is classed as a risk. I think it's something to do with it being harder to monitor a baby during labour due to the extra weight. I was about 90 kgs when I was in labour (had been 76.5 at 5 foot 1 so about 20kgs over what I should have been pre pregnancy) and they had trouble getting a heartbeat several times, so I guess the more weight you have on the harder it gets. I was not on a monitor at anytime so they had to just do it by a doppler and you could tell it was really hard for them.
The good news is that I've noticed most bigger ladies tend to put on less pregnancy weight than what the smaller ladies do. A week after the birth I only had 3 kgs to lose to get back to where I was pre pregnancy (and it's still there unfortunately).
I didn't actually put any weight on til around 20 weeks, in fact during the first tri I lost weight. I even had some workmates not realise I was pregnant until the third tri and even then I had to tell them. I had a really easy pregnancy and I am no spring chicken.
My DF loved my extra curves whilst I was pregnant. He never went off me, it was actually the opposite. For most of the pregnancy I felt great & I looked it too as I was glowing - everyone kept telling me so.
I never got high blood pressure & I didn't get GD even though I was in a high risk group due to my age as well.
I've known a number of ladies larger than myself who've had no issues getting pregnant, staying pregnant & giving birth without any issues.