wow, that really seems like a lot to put on you! i think you should lay it all out on the table for him...make him sit down and really listen to what you have to say. before that, keep tract of how often/how many times w/in 1 hr, or even the day, you have to run to the bathroom. if you do that and point out how many time he's going to HAVE TO stop for you to use the rest room, then point out how long you have until your child will most likely freak out to want OUT of his car seat, hopefully he'll understand. you say he'll be 18 months, well, my daughter is going to be 19 months on monday, and i'm lucky if i can get across town into the next one (that's about 15-20 min) before she starts to throw a major tantrum that she wants out (unless of course she's 100% pre-occupied, or zoned out which you really can't plan on). and to be in the car for 2 days, omg i just couldn't begin to imagine the torture...pointing that out alone should be good enough to make him not want to go...then adding on top of that you're much needed restroom breaks should throw him over the top to want to stay home. and don't just point out the ride there...but back, and as you pointed out, the cost it will be financially with the raise in gas prices. have it all down on paper. if you want, you can go and do a pro's con's list on him....make sure you add in how stressed all 3 of you will be once you finally get there, and how stressed you'll be when you get back home. it honestly just doesn't seem like it's worth it. i have no clue on his parents' financial situation, while they may have all the time in the world to take the trip, financially it may be hard on them. tell your husband if this is the case, to offer to pay some, around what it would cost financially to take the trip there...maybe that will get them to come if they don't have to pay. and while you may not be able to just throw that money away, i feel it would definitely be worth it for you in the end...you would have spent it if you drove anyway, now you don't have to be stuck in the car for that time, and you get to sit back and relax. holidays with the family are stressful enough, no need to add to the stress. and if after all those points are made, he STILL doesn't listen to you, just tell him you'll see him when he gets home (whether you would actually stay home while he went or not). good luck, be strong, and stick to what YOU want/need. and congrats on baby #2! oh, also i like what another mom said before...if you HAVE to travel, and can't get out of it...look into taking the train if you can. this way your son will be able to move around, you'll have your bathroom breaks (i'm pretty sure they have rest-rooms...i've never been on a train so i couldn't be positive, but it's worth looking into). once again, good luck!