Pretty much down to doing the best you can and what you feel is the safest. We had car seats in both our previous motorhomes. Both were in the dinette seats, and the table had to be dropped to allow for this. What stinks, is these were in the slides, and guess what'll probably come out in a major accident, the slide. Just the risk that is taken. Now, I did see one guy with a Tiffin go above and beyond. He mounted a seperate captains type chair where normally a movable recliner was. He bolted it straight through to the steel floor structure with some modifications, just like the front seats. Then, that's where he put his car seat. He did this due to the reason I mentioned above, dinette being in a slide held to motorhome by a few bolts at the most. Motorhomes are kind of in a category of there own, like school busses.
John and Rebecca Dickson
Emma-7 / Little John-5 / Iva-1
Full Timing Again, Rev B
2013 Ford F-350 Lariat CC LB PSD
2015 SOB TT - With OC's Awning Poles (#8)
At least in Heaven, RVs will be perfect, and I won't have to keep fixing them.