N., Are you ready to stop nursing or getting ready? If not, there is no need to wean him. If you're still enjoying it, then I would pump enough milk for him to have while you're gone and keep on. He will start eating more food between now and when he's a year old, and as he eats more, he will nurse less. My kids never nursed on a schedule, sometimes they nursed a lot in a day and sometimes less, they know when they need it. If you leave him for a day or two, he will most likely pick right back up with your breast when you get back, if you want that. If you are ready to start weaning, consider doing it gradually, realizing he may have "set backs" for teething or illness, etc. The Baby Book by Dr Sears has some good suggestions for weaning to formula.
At his age, he can go to a sippy cup rather than a bottle, but keep in mind that a baby's sucking needs can extend to 3 or 3 and a half, so he will need some other way to satisfy that - a pacifier or he might prefer a bottle just to suck. Some people start with bottles of pumped milk and then gradually change the ratio of mostly breastmilk and a little formula and then more and more formula. This way his body can get used to the change and you can see if he has any allergic reactions.
I am personally a big fan of extended nursing, it comes in SO handy, and is, in my opinion, so great for your baby and you! Here are some of the advantages I have found: mom's breast can fix most anything at anytime. That's a great tool to have. I've always felt it helps me to chill out and be tuned into my babies and toddlers. (not saying you can't be if you're not nursing, i just think it helps) The skin to skin and eye contact is great for bonding (you can do that with a bottle too). You can't beat the nutrition of breastmilk which actually changes to meet the needs of your baby as your baby grows which i find miraculous! i think babies turn to mom's breast for so much more than just nutrition, and there is no other reassurance quite like it for little ones (just my opinion).
Having said all that, I am a big fan of listening to your gut about when you are ready to stop.
In my experience, 8 months to 2 years is a time of getting teeth and beginning to individuate. my kids nursed a lot for comfort at those ages. so, just be aware that those are real needs for him that nursing used to satisfy and think of ways to replace that for him. if he doesn't get your breast, he gets something else, a cuddle and a pacifier or a teething something or a warm bottle of rice milk while you hold him and sing to him or whatever. know that he is looking for the whole package that was nursing for him, not just food, and your weaning will be more successful for you both, in my opinion. good luck to you and your baby, you will do great.