For camping and spending the night at my sister's house for the holidays, we had those inflatible sleeping bags - more like a huge pillowcase with an air mattress in a separate pocket on the back. It was great and the kids loved them.
Is there a way to convert your crib to a toddler bed/daybed? This is more of a gradual transition whereas she will still feel at home with her bed, yet be able to get in and out on her own.
My kids (twins) are small so we moved them into toddler beds at about 18 months when they discovered they could climb over the top. Both toddler beds fit in their room, and they actually stayed with them until right after kindergarden. It just fit out situation, and they weren't outgrowing the size of the bed so we left them in them. We tried splitting them in to separate rooms with a twin-daybed for her and a full mattress (the old guest bed) for him - they weren't having it. So, we set the daybed and the trundle up in one room and they shared a room for about another year or so before switching back into two separate rooms. Now she had the daybed to her self and he's in the full.
As far as transitioning, don't start on a week night because she'll want to get up and out of bed many times at first. Make it fun too and most of all, make it seem as if she's in charge of the situation. Let her pick out a new blanket or pillow for the new bed. Let her know that once she's in the bed, it's bedtime and she needs to stay there. Be the hallway police for the first night or two to see if she's going to be the roaming type. Fortunately, neither of mine were so our transition was simple that way. Consistency is the key - if she's up and about, calmly, without eye contact and without conversation beyond "bedtime", take her hand and walk her back to bed, cover her up and walk out of the room. Repeat each and every single time as needed, after the third time, use no words, no emotion, no subtle body language. Be as "mechanical" as possible. This may take 3 or 4 night's worth of hallway policing but once she "gets" that she's going to be walked back to bed each.and.every.single.time, the game will no longer be fun. Not engaging in conversation, cuddling, backrubbing, or any other means of communication with her will say to her that she can't manipulate you into one more book, one more drink of water, one more hug, nothing. It's bedtime - PERIOD.
So, now that she's used to the idea of what bedtime truely is, you can work on the camping scenerio. Get whatever she will be sleeping in for the trip and have a pretend campout at home. Set up the family room, or any other open space and have a few practice runs ofer the course of the next few weeks/month. Be sure to use a lantern (or whatever other battery operated device you will have), etc. and make it a special event.
I think you'll do fine with some preparation. Good that you're starting early!